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US #2111a "D" (22¢) Eagle Vertical Imperf Imperforate Pair, VF NH MNH

$ 24.2 $ 14.52

CE1 Air Mail Special Delivery EFO Plate Pair--Missing Perforations on bottom row

$ 88 $ 52.8

#1615CF IMPERF COIL LINE PAIR-PC BM2250

$ 12.1 $ 7.26

Scott #2482a Bobcat Black Missing ERROR Mint Sheet of 20 W/ Weiss Certificate

$ 2639.12 $ 1583.47

1733a, MNH Spectacular Two Way Misperf Error Sheet of 50 Stamps - Stuart Katz

$ 875.6 $ 525.36

1965 US #1280a - 2c Wright Miscut Booklet Pane showing 50% of Plate 29559 MNH

$ 6.16 $ 3.69

US Scott #2915Ad Plate # 11111a imperforate stripe of 6 Extra Fine

$ 220 $ 132

3281e 33c Flag over City Small Date Die Cut Omitted Error Pair

$ 219.95 $ 131.97

C98, 40¢ Multiple Colors Shifted Error Airmail Stamp Mint NH - Stuart Katz

$ 14.91 $ 8.94

2590, Tremendous Misperforation Error Plate Block Mint NH - Stuart Katz

$ 154 $ 92.4

Double Paper & Tape Slice ERRORS - Very Unusual Group of Five - Stuart Katz

$ 131.12 $ 78.67

#2031a "SCIENCE & INDUSTRY" BLACK OMITTED MAJOR ERROR XF-NH CV 0 garyposner

$ 561 $ 336.6

1555 - 10c Griffith - Color Shift NH Appear as Doubling

$ 50.16 $ 30.09

US EFO Scott #1305E 15c Holmes Coil strip of 3 major misperf mint!

$ 5.28 $ 3.16

EFO 1153 PERF SHIFT PUTS "July 4, 1960" AT BOTTOM, NOT AT TOP! (WITH NORMAL COPY

$ 12.32 $ 7.39

US MINT SINGLE 33 CENT SCOTT 3307 DAFFY DUCK IMPERF RIGHT SIDE PANE ISSUED 1999

$ 3.07 $ 1.84

US Scott #1555 10c D. W. Griffith MNH Mint NH EFO color shift

$ 2.63 $ 1.57

US EFO Scott #1299 Coil Pair USED 1c Jefferson Major Misperf!

$ 3.96 $ 2.37

1822, Misperf Error 15¢ Block of Four Stamps With Normal Mint NH - Stuart Katz

$ 26.4 $ 15.83

US EFO Scott #1305E 15c Holmes Coil strip of 3 major misperf mint! (2)

$ 5.28 $ 3.16

805 1½¢ Prexie Martha Washington misperf MNH

$ 4.39 $ 2.63

2440a, 25¢ Love Imperforate Pair ERROR - VF NH Cat 0.00 - Stuart Katz

$ 396 $ 237.6

Flag Over Yosemite MNH MISPERFED strip 5, scott 2280

$ 4.22 $ 2.53

2115f, RARE Transitional Imperforate Strip of 8 With PL# 8 - Stuart Katz

$ 435.6 $ 261.36

1041 Var 8 Cent LIBERTY Dramatic Vignette Color Shift Major Error - Stuart Katz

$ 286 $ 171.6

Error 2608Ac Imperforate PL # 1111 Strip of 6 NH OG Very Fine LB

$ 352 $ 211.2

United States Postage Stamp #2635 MNH Denomination Location ERROR

$ 70.4 $ 42.24

2280 Misperf & Miscut Error / EFO Strip of 3 "Yosemite" Mint NH

$ 10.55 $ 6.33

US, coil stamp roll packing label, probably for 5-cent George Washington #1229.

$ 3.08 $ 1.84

US EFO Scott #1305E 15c Holmes Coil strip of 5 major misperf mint!

$ 6.6 $ 3.95

US EFO Scott #1305E 15c Holmes Coil strip of 6 major misperf mint!

$ 7.92 $ 4.75

US EFO Scott #1305E 15c Holmes Coil strip of 4 major misperf mint!

$ 7.04 $ 4.22

807a 3c Jefferson Prexie miscut booklet pane MNH

$ 4.39 $ 2.63

1436a Black and Olive Colors Omitted MAJOR ERROR - Mint VF NH - Stuart Katz

$ 396 $ 237.6

US Error (EFO) Mint OG NH Missing Flag (Block of 4) - AuctionsOnline

$ 38.28 $ 22.96

US Scott #1529 pair w/ a Radical shift Mint NH OG Extra Fine

$ 176 $ 105.6

BEAUTIFUL! US REVENUE R60c THICK PAPER HORIZONTAL STRIP OF 3 VF DIFFICULT! NICE!

$ 15.79 $ 9.47

US EFO Scott #2429a 25c Christmas Sleigh single misperf used!!

$ 4.84 $ 2.9

C86, Mint NH 11¢ Amazing Color Shift Error Plate Block YIKES! - Stuart Katz

$ 132 $ 79.2

TD130G Single Test Stamp

$ 127.6 $ 76.55

1611, RARE Lantern Orange Color Shift Error Mint NH - Stuart Katz

$ 22 $ 13.2

US EFO Scott #1906 17c Electric Auto Coil strip of 5 USED, Mis-cut!

$ 6.6 $ 3.95

1843a, 15¢ Imperforate PL# Strip of 20 Stamps CV 0.00 - Stuart Katz

$ 330 $ 198

2457b 10c Tractor Trailer All Colors Omitted from Original Strip

$ 109.95 $ 65.97

525, Mint LH 1¢ Scarce Large Misperfed Error Pair - Stuart Katz

$ 21.95 $ 13.17

1879a, Mint NH 18¢ Misperfed Error Block of Four - Roses - Stuart Katz

$ 35.15 $ 21.09

1764-67a, MNH 15¢ Trees Perf Shift Error Full Sheet of 40 Stamps - Stuart Katz

$ 259.6 $ 155.76

SCOTT 1856c 1985 14 CENT SINCLAIR LEWIS ISSUE IMPERF PAIR MNH OG VF!

$ 4.4 $ 2.64

3001, MNH Very RARE Perf Shift Error of a Modern Sheet - Stuart Katz

$ 523.6 $ 314.16

U2 Washington Unused Cut Square (Bx 1017)

$ 61.59 $ 36.95

2177 MNH 15¢ Dry Printing Error Sheet of 100 Stamps - Stuart Katz

$ 259.6 $ 155.76

899b, MNH 1¢ Two Imperforate Between Pairs in Full Sheet Error - Stuart Katz

$ 83.6 $ 50.16

#2259 13.2c Coal Car EFO Misperforated Pair MNH OG "Include New Mount"

$ 5.28 $ 3.16

United States Postage Stamp #2618a MNH IMPERF BETWEEN ERROR

$ 264 $ 158.4

1035, Mint NH 3¢ Large Misperf Errors - Nice Lot of Three - Stuart Katz

$ 30.75 $ 18.45

2095, MNH 20¢ Misperf Error In Block of 20 Stamps - Stuart Katz

$ 66 $ 39.6

#3069a "GEORGIA O'KEEFE" IMPERF PANE OF 15 MAJOR ERROR HV7809

$ 770 $ 462

3477 34¢ Misperforated Error PNC 4444 Coil Strip of Six Stamps * Stuart Katz

$ 44 $ 26.4

ERROR USA Scott #2377 MISPERFED Vertically NH Stamps Sheet of 50 FRANCIS OUIMET

$ 703.99 $ 422.39

#2261a AVG-OG NH Miscut Imperf Strip (JH 6/5/21)GP

$ 308 $ 184.8

3280 - 33c Misperf Error Error / Pair "Flag And City" Mint NH

$ 3.95 $ 2.37

1055 & 1057 - Miscut Error / EFO Line Strips of 5 W/ Part Pl#'s Mint NH

$ 8.79 $ 5.27

Lot of 10 EFO Misperforated Pairs MNH OG VF #1 List of Catalog #'s Below

$ 59.84 $ 35.9

Error 2551a Imperforate Between Mint NH OG Extra Fine LB

$ 844.8 $ 506.87

US Scott 1897 500 Stamp Coil Roll Omnibus Transportation In Original Packaging.

$ 218.78 $ 131.27

915a VF NH Blue & Red Over Black Reverse Printing Error W/Normal - Stuart Katz

$ 26.35 $ 15.81

U.S. #1271a Mint NH w/Cert - 1965 5c Florida, Yellow Omitted

$ 122.32 $ 73.39

R6c, Pre Printing Paper Fold Error Group of 30 Stamps - WoW Stuart Katz

$ 787.6 $ 472.56

United States Postage Stamp #2718a Christmas Toys Imperf Proof Pane

$ 369.6 $ 221.76

2189, MNH 52¢ Misperfed Full Sheet of 100 Stamps Scarce Error! - Stuart Katz

$ 259.6 $ 155.76

POSTAGE DUE POST CARD LONDON (MAY 30, 1902) TO NEW YORK (JUNE 8, 1902)  SCARCE!

$ 4.35 $ 2.61

EFO 1471A ERROR -- MISSING PINK COLOR -- COMPARE FACE TO NORMAL AT LEFT

$ 52.8 $ 31.67

4133a (41c) American Flag Die-cut Omitted Error Pair CV 1,250.00

$ 373.95 $ 224.37

USA 832g used .. 2021 Scott=.00

$ 0.44 $ 0.26

2046, Mint NH 20¢ Rare Misperf Zip Block Babe Ruth Error - Stuart Katz

$ 154 $ 92.4

Scott #2482a Bobcat Black Missing ERROR Mint Plate Block of 4 Stamps NH (2482-1)

$ 703.99 $ 422.39

2335a, MNH Color Shift Wildlife Error Sheet of 50 Stamps - Stuart Katz

$ 220 $ 132

MISPERFED , SCOTT 2261, 16.7 popcorn wagon, mnh

$ 0.87 $ 0.52

US SCOTT #2235a-2238a Intaglio Black Omitted, Margin Pairs (GARY 9/8/20)

$ 149.6 $ 89.76

SCOTT #2015 20c AMERICA'S LIBRARIES, PERFS SHIFTED DOWN from the BOTTOM ROW

$ 16.28 $ 9.76

Scott# 632a - ERROR MISCUT- PARTIAL PLATE # - booklet pane of 6 - Mint Hinged

$ 21.56 $ 12.93

#2280a 25c Yosemite Flag EFO Misperforated Strip of 5 MNH OG VF

$ 22 $ 13.2

#2893 VAR. "OLD GLORY" STRIP OF 4 WITH UNIQUE ERROR (3) DIFF COLOR "BLUE" HV3147

$ 660 $ 396

RARE Postal Envelope U597 15c High Wheeler Bicycle ERROR ALL BLUE COLOR MISSING

$ 105.6 $ 63.35

1509 10c Flag blue color shift MNH

$ 3.3 $ 1.97

EFO 1287 MISPERFED "JFK" CREATES A "3-CENT STAMP"

$ 11 $ 6.6

#702 2c Greatest Mother Red Cross Error "4 Varieties" MNH OG VF #5

$ 17.6 $ 10.56

US Scott #1510e imperf pair Mint NH OG SCV 0

$ 211.2 $ 126.71

C58 - Inking Error / EFO "Statue of Liberty" Pair Mint NH

$ 5.27 $ 3.16

3095b Special Die Cut Printing Pane 20 "Riverboats" MNH

$ 131.99 $ 79.19

1856b, RARE COMPLETE SHEET ERROR VF NH Cat ,000.00+

$ 2635.6 $ 1581.36

Sc J100a Postage Due Missing "D" of Dollar Used Sound As Per Scans (AUG2)

$ 52.75 $ 31.65

EFO 588 OFFSET OF DESIGN ON GUM SIDE. NOTE NEAVY INKING ON FACE SIDE

$ 22 $ 13.2

1916-1932 PSE 3 Cent Scott U536 Full Embossed Albino No Color Envelope 9 1/2"

$ 5.27 $ 3.16

1967 6c Franklin D. Roosevelt FDR Miscut Booklet Pane Error Stamps MINT! #1284b

$ 5.27 $ 3.16

EFO 1213a SCARCE BOOKLET FOLDOVER SHOWS 90% PLATE # PLUS EE MARKING!

$ 66 $ 39.6

J89, MNH 1¢ Shifted Up Full Sheet of 100 Error Stamps - Stuart Katz

$ 87.12 $ 52.27

2609, 29¢ COIL MISPERFORATED ERROR STRIP OF 8 = Stuart Katz

$ 21.95 $ 13.17

1972 US SC 1473 8c Pharmacy EFO Block of 4 - Misregistration Error - MNH

$ 10.45 $ 6.27

2018, MNH 20¢ Partial Black Color Missing Pair With Normal - Stuart Katz

$ 66 $ 39.6