United States

2866a, MNH 29¢ Nice Perf Shift Error Freak Block - Stuart Katz

$117.50

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1837a, MNH 15¢ Scarce Misperfed Error Block of Four - Stuart Katz

$70.50

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1559a, MNH 8¢ Back Inscription Omitted Freak Error PL# Strip of 20 CV $2200.

$935.30

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1473, MNH 8¢ Large Color & Perf Shift Error Freak Sheet of 50 - Stuart Katz

$1,175.00

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1455, MNH 8¢ SLANTED COLOR SHIFT FREAK ERROR Sheet of 50 WoW - Stuart Katz

$1,410.00

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219-29P4, XF Set of Card Proofs Includes 219D - Very Fresh Colors * Stuart Katz

$550.00

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1382, MNH 6¢ Dramatic Perf Shift Freak Error Football Plate Block - Stuart Katz

$56.35

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1145, MNH 4¢ Nice Perf Shift Error Freak Pair - Boy Scouts - Stuart Katz

$56.35

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1612, Mint NH $5 Lantern In Complete Sheet of 100 Stamps * Stuart Katz

$769.95

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1557, Mint NH 10¢ Big Color Shift Error Space Stamp - Fantastic! - Stuart Katz

$37.60

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1469, MNH 8¢ Yellow Color Shifted Right Error Freak Full Sheet - Stuart Katz

$705.00

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1471, MNH 8¢ Misperf Crazy Freak Error Perforations FULL SHEET! - Stuart Katz

$1,687.30

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1472, MNH 8¢ Nice Perforation Shift Error Freak Sheet of 50 - Stuart Katz

$187.06

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2618, Mint NH 29¢ Great Misperf Error That Shows Gutter -- Stuart Katz

$37.55

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Florida Everglades Sheet of Fifty 3 Cent Postage Stamps Scott 952

$14.00

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1394d, MNH 8¢ PB Red Color Missing From Top 2 Stamps Freak Error * Stuart Katz

$211.50

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1946, MNH 20¢ Misperfed Sheet of 100 Stamps Freaky Error - Stuart Katz

$93.06

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1549, MNH 10¢ Massive Misperf Shift Freak Error - Stuart Katz

$46.95

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1285, MNH 8¢ Misperf Shift Freak Error Plate Block - Stuart Katz

$46.95

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1529, MNH 10¢ Black & Yellow Shifted Up Freak Error Sheet of 50 - Stuart Katz

$705.00

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1529, MNH 10¢ Massive Black Color Shifted Way Up Freak Error Sheet - Stuart Katz

$1,687.30

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1505, MNH 10¢ Red Color Shift Freak Error Plate Block - Stuart Katz

$93.06

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1294, MNH $1 Dramatic Under Inking Freak Error Sheet of 100 Stamps - Stuart Katz

$559.30

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1510, Mint NH 10¢ Misperforation Shift Freak Error Sheet of 100 - Stuart Katz

$465.30

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1338F, MNH 8¢ Misperf Shift Freak Error Plate Block of 20 Stamps - Stuart Katz

$187.06

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1400, MNH 21¢ RARE Misperf Freak Error Sheet of 100 Stamps * Stuart Katz

$1,405.30

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1286, MNH 10¢ Misperf Freak Error Sheet of 100 Stamps PL# Captured * Stuart Katz

$841.30

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1286, MNH Fold Over Freak Error Sheet Makes For Wild Stamps * Stuart Katz

$653.30

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1511, MNH 10¢ Misperforated Freak Error Sheet of 100 Stamps - Stuart Katz

$935.30

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1394d, Pre Print Paper Fold And Red Color Missing Freak Error Block Stuart Katz

$234.06

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1591, MNH Misperf Misplaced Pins Freak Error Sheet of 100 Stamps - Stuart Katz

$371.30

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1286, MNH 10¢ Massive Misperf Freak Error Sheet of 100 Stamps * Stuart Katz

$1,405.30

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1444, MNH 8¢ Nice Gold Color Shift Freak Error Sheet of 50 - Stuart Katz

$705.00

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1289b, MNH 20¢ MASSIVE Ink Smear Freak Error Sheet of 100 Stamps - Stuart Katz

$747.30

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1603, MNH 24¢ Large Misperfed Sheet of 100 Stamps Freaky Error - Stuart Katz

$1,499.30

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1338F, MNH 8¢ Dramatic Misperf Shift Freak Error Sheet of 100 Stamps Stuart Katz

$893.00

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2171, MNH 4¢ Misperfed Sheet of 100 Stamps Freaky Error - Stuart Katz

$112.75

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1858, MNH 18¢ Large Misperf Freak Error Sheet of 100 Stamps - Stuart Katz

$1,875.30

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1289, MNH 20¢ MASSIVE Perf Shift Freak Error Sheet of 100 Stamps - Stuart Katz

$1,175.00

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Christmas Wreath Sheet of One Hundred 4 Cent Postage Stamps Scott 1205

$22.95

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Rose and Love Letter Sheet of 20 Stamps - 55 Cent Postage Stamps Scott 3499

$24.88

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1705, MNH 13¢ Reverse Printing Under Gum Plate Block Error * Stuart Katz

$117.50

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1473, MNH 8¢ Partial Reverse Printing Under Gum Freak Error * Stuart Katz

$46.95

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C71, MNH 20¢ Full Reverse Printing Under Gum Strip Error * Stuart Katz

$164.50

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1473, MNH 8¢ Remarkable Color Shift Misperf Freak Error Block * Stuart Katz

$705.00

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C81, MNH 21¢ Partial Reverse Printing Under Gum Plate Block Error ** Stuart Katz

$164.50

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1359, Mint NH 6¢ Reverse Printing Under Gum Zip Block EFO Error * Stuart Katz

$164.50

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1499, MNH 8¢ Perf Shift Freaky Error Sheet of 50 Stamps * Stuart Katz

$423.00

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1288, MNH 15¢ Amazing Misperf Shift Error In Sheet of 100 - Stuart Katz

$559.30

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1486, MNH 8¢ Misperforated Freaky Error Plate Block of 16 Stamps * Stuart Katz

$187.95

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1474, MNH 8¢ Black Color Shift Freaky Error Sheet of 40 Stamps * Stuart Katz

$371.30

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1468, MNH 8¢ Four Different Color Shift Freaky Errors * Stuart Katz

$46.95

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Volunteer Firemen Sheet of Fifty 3 Cent Postage Stamps Scott 971

$14.95

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Tennessee Bicentennial Pane of Twenty 32 Cent Postage Stamps Scott 3070a

$12.95

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Utah Centennial Sheet of Fifty 3 Cent Postage Stamps Scott 950

$14.95

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1582, Mint NH 2¢ Misperfed Plate Block - EFO ERROR Freak - Stuart Katz

$28.15

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937, MNH 3¢ Under Inking Sheet of 100 Stamps EFO ERROR Freak - Stuart Katz

$46.95

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O127-33, Mint NH Official Sheet Collection 1¢-$5 Values - Stuart Katz

$995.00

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975, MNH 3¢ Over Inking Sheet of 70 Stamps EFO ERROR Freak - Stuart Katz

$935.30

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1068, Mint NH 3¢ Misperfed Error Pair of New Hampshire Stamps - Stuart Katz

$37.55

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917 Var, MNH Partial Reverse Printing of Flag Colors P.B. - ERROR - Stuart Katz

$559.30

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3001, MNH 32¢ Naval Academy RARE Misperfed Error Sheet of 20 - Stuart Katz

$371.30

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2238c, MNH 22¢ Black Omitted Error Plate Block of Four Stamps - Stuart Katz

$235.00

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Oregon Trail Sheet of Fifty 29 Cent Postage Stamps Scott 2747

$20.95

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632, Unused 1¢ Under Inked & Misperfed Error Strip of 4 Stamps - Stuart Katz

$141.00

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2142, 22¢ Scarce Misperfed Error Winter Olympics Mint NH - Stuart Katz

$23.45

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1529 Var, MNH 10¢ 99% of Red Color Missing Freak Error - Skylab - Stuart Katz

$65.75

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1720a, Mint NH 13¢ Diagonal Misperfed Error Block of 4 Stamps -- Stuart Katz

$89.30

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557, Mint NH VF 5¢ Roosevelt Block of Four -- Stuart Katz

$99.00

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1338F, MNH 8¢ Spectacular Misperf Top Plate Block of 20 - Stuart Katz

$235.00

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701, Mint NH F/VF 50¢ Plate Block of Four CV $230. - Stuart Katz

$150.00

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C14, Used VF $1.30 Zeppelin - Nicely Centered And Sound - Stuart Katz

$350.00

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1158, Mint NH 4¢ Misperforation Error - Washington Monument - Stuart Katz

$23.45

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1478, MNH Pre Print Paper Fold And Color Shift Errors - Stuart Katz

$371.30

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2440, Mint NH 25¢ Amazingly Huge Misperf Shift Error Block of Six - Stuart Katz

$117.50

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C63, Mint NH 15¢ Two Way Misperf Error Block of Four - Stuart Katz

$56.40

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320A, Mint Superb Hinged 2¢ Type II Pair - Stuart Katz

$99.00

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2238a, Mint NH 22¢ Black Color Shift Error Block of Four Stamps Stuart Katz

$70.50

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1529, MNH 10¢ Massive Perforation Shift Error - Skylab - Stuart Katz

$117.50

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1551, MNH 10¢ Misperforated Error Plate Block of 12 Stamps - Stuart Katz

$164.50

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1734, Mint NH 13¢ Misperforated Error Block of Four - Stuart Katz

$56.35

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2414, Mint NH 25¢ Plate Block Gold Color Shifted Way Down Error - Stuart Katz

$117.50

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1529, MNH 10¢ Reverse Printing Under Gum Error - Skylab - Stuart Katz

$46.95

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2238a, Mint Sheet With Dramatic Over Inking Error - Stuart Katz

$329.00

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CE1, Mint NH Superb 16¢ With PSAG Graded 98 Certificate *-* Stuart Katz

$85.00

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566, Mint NH VF 15¢ Statue of Liberty Block of Four -- Stuart Katz

$109.95

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2178, Mint NH 17¢ Misperforation Error Block of Four Stamps -- Stuart Katz

$47.00

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1434-5, MNH 8¢ Partial Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$46.95

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R209, Mint NH 3¢ Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$46.95

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1558, Mint NH 10¢ Misperforated Error Blco of Four - Hard to Find! Stuart Katz

$56.35

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1358, MNH 6¢ Partial Reverse Printing Under Gum Freak EFO Error * Stuart Katz

$70.50

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1529, MNH 10¢ Massive Color Shift Error - Skylab -- Stuart Katz

$89.30

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Christmas Magi Book of 20 - Stamps Scott 4945b

$42.19

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2618, Mint NH 29¢ Great Misperf Error That Shows Gutter - Stuart Katz

$37.55

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The Holy Family Booklet of 20 First Class Christmas Stamps Scott 4711c

$36.55

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1194 Var, 4¢ Mercury With Most of Yellow Color Missing Error - Stuart Katz

$28.15

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