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#1483A w/ reg #1483 Significant shift of vignette down and to left (J 3/26/2020)

$ 259.6 $ 155.76

US EFO Scott #300 1c Franklin Used single, major Mis-perf to right!

$ 6.6 $ 3.95

C81, Mint NH 21¢ HUGE Color Shift Error Strip of Three - Fantastic! Stuart Katz

$ 220 $ 132

Scott #C76 10¢ 50th Anniversary MAN ON THE MOON 1969 Apollo 11 Block of 4 MNH/OG

$ 1.75 $ 1.05

CE2 Air Mail Special Delivery Plate Strip--Rare EFO "Experimental" Gum Breakers

$ 70.4 $ 42.24

R3c, Pre Printing Paper Fold Error Group of 15 Stamps - WoW Stuart Katz

$ 396 $ 237.6

Airmail C119a Missing Color VF OG NH SCV. 50 (JH 6/5/21)GP

$ 770 $ 462

Nebraska Territory # 1060 GUTTER SNIPE block of 4 MINT NH OG

$ 4.35 $ 2.61

US SCOTT #1542a DULL BLACK Omitted, SCV 0.00! Wonderful from garyposner!

$ 198 $ 118.8

1078, 3¢ RARE Misperf Error Mint NH Antelope - Stuart Katz

$ 17.55 $ 10.53

Scott #2482a Bobcat Black Missing ERROR Mint Plate Block of 4 Stamps NH (2482-2)

$ 703.99 $ 422.39

Error 2092a imperf between Mint OG NH Extra Fine SCV 5 (09/21 TJ)

$ 210.32 $ 126.19

US #1910 Gift of Self 18c, sheet of 50, EFO ink smear

$ 13.19 $ 7.91

US #2121a 22¢ Seashell Booklet, EFO w/ pane of 10 with ink smears across pane

$ 11.43 $ 6.85

US Scott # 2745a Space Fantasy Booklet, Mint NH EFO, blue ink stain

$ 7.91 $ 4.74

US #2440 1990 25c Love Series: Love Birds, Pane of 50 Mint NH, EFO misperf

$ 21.99 $ 13.19

US BK211 2790a Christmas 1993 booklet of 20 EFO color shift picture shift

$ 11.43 $ 6.85

1288 OLIVER WENDELL HOLMES BOOKLET 3 PANES ALL ERROR STAMPS MISPERFED

$ 44 $ 26.4

United States Postage Stamp #3031 MNH Blocks of 4 Color Varieties RARE

$ 844.8 $ 506.87

1897 - Misperf Error / EFO Pair "Omnibus" Mint NH

$ 5.27 $ 3.16

US EFO Scott #2255 Caretta 7.6c Transportation Single Mint Major Misperf!

$ 2.2 $ 1.32

Error 2551a Imperforate Strip of Five Mint NH OG Very Fine LB

$ 352 $ 211.2

Error 1597c Imperforate Between Mint NH OG Very Fine PFC LB

$ 440 $ 264

Scott 1381a Baseball Issue Black Color Omitted ERROR Stamp NH w/ PF Cert

$ 395.99 $ 237.59

1393 6¢ Eisenhower change of design misperf MNH

$ 2.59 $ 1.55

SCOTT 1057, 3c LIBERTY, MISCUT strip of 5 with LINE and partial plate number MNH

$ 2.46 $ 1.47

#2130a 10.1 Oil Wagon EFO Misperforated Pair MNH OG "Includes New Mount"

$ 8.8 $ 5.28

1477 8c Posting a Broadside misperf MNH

$ 5.05 $ 3.03

1683, MNH 13¢ Misperf And Tagging Shift Error Block of 10 Stamps - Stuart Katz

$ 220 $ 132

United States Error Stamp Scott No 1804 Block of Four Imperfect Banneker OG MNH

$ 114.35 $ 68.61

RARE 1951 Set 7 US Postal Colorado FIRST DAY COVER ISSUES DOUBLE STAMPED ERROR

$ 74.8 $ 44.88

US #2198-2200 Stamp Collecting 1986 22c Booklet singles, 3 EFOs EFO color shift

$ 2.63 $ 1.57

1910, 18¢ Red Cross TWO BLOCKS OF FOUR - Stuart Katz

$ 211.2 $ 126.71

1467a, MNH 8¢ Color Shift Error Sheet of 32 Stamps - Stuart Katz

$ 131.12 $ 78.67

1988 US SC# 2283 & 2283b - Pheasant + Red Sky Omitted/Removed Error Variety EFO

$ 2.68 $ 1.61

RW88 Duck Stamp Snow Goose Error MNH Block White color shifted right

$ 77.44 $ 46.46

2474b, White "USA 25" Omitted Error Booklet Pane With Normal - Stuart Katz

$ 52.75 $ 31.65

1363c, 6¢ Stamp With Yellow Color Omitted Error With Normal - Stuart Katz

$ 26.35 $ 15.81

1338, Mint NH 6¢ Pre Printing Paper Fold Error & Misperf Block - Stuart Katz

$ 132 $ 79.2

1804, Large Misperforation ERROR PB of 12 Stamps Black Heritage - Stuart Katz

$ 132 $ 79.2

1237, Mint NH 5¢ Large Perf Shift Margin Pair - The Sciences - Stuart Katz

$ 57.15 $ 34.29

1035, 3¢ Scarce Misperfed Error Strip of 3 Stamps Mint NH - Stuart Katz

$ 30.8 $ 18.48

1605, Mint NH 29¢ Misperforation Error Block of Six - Lighthouse - Stuart Katz

$ 52.8 $ 31.67

US EFO Scott #2949a Love Booklet Single USED!

$ 2.2 $ 1.32

US #117 12c Green 1869 Pictorial used fresh perf. shift

$ 68.64 $ 41.18

2096a, VF NH Imperforate Between Error Horizontal Pair - Stuart Katz

$ 132 $ 79.2

US #4905b MNH Vintage Circus Posters IMPERF "no die cuts" Stamp Sheet

$ 21.12 $ 12.67

1946 Var, MNH 20¢ Almost a Complete Gutter Pair Errors Block of 20 - Stuart Katz

$ 132 $ 79.2

1975 US SC 1555 D.W. Griffith - Used, Print Registration Alignment Error

$ 3.34 $ 2

scott 3466 stature of liberty — MISPERFED strip of 4

$ 3.51 $ 2.1

#1506a Black and Blue Omitted (GP2)

$ 400.4 $ 240.23

#1617 10c Right To Petition perf. shifted Coil Single Dull Gum Mint NH OG

$ 5.23 $ 3.14

*** US #5260 FOREVER FLAG MISCUT COIL PAIR MNH NICE ****

$ 11.43 $ 6.85

CE1 Air Mail Special Delivery EFO misperforation (crazy perf) selvage fold-over.

$ 39.6 $ 23.76

R69c inl ex double perfs, f-vf

$ 0.87 $ 0.52

Scott 933, 5 cent, Roosevelt, Mint Sheet, EFO guttersnipe gutter snipe

$ 12.31 $ 7.38

1541a Large Color Shift ERROR Block 10¢ Minerals W/Normal Mint NH - Stuart Katz

$ 110 $ 66

Scott c82 - MISCUT strip of 2 with LINE and partial plate number MNH

$ 5.98 $ 3.59

R68c for ex stray perfs, 1/18/(186)7 A.B. & co. hs, f-vf

$ 0.87 $ 0.52

1555, 10¢ SCARCE HUGE COLOR SHIFT ERROR - MINT NH

$ 39.56 $ 23.73

EFO 299 "SINKING SHIP" BLACK VIGNETTE OVER "FAST NAVIGATION" -MARGIN INSCRIPTION

$ 132 $ 79.2

US EFO Scott #1402 8c Ike 2 singles major misperf Used!

$ 2.2 $ 1.32

US SCOTT #2760-4a b, (4) Booklet Panes! Black Omitted, SCV 0, garyposner

$ 352 $ 211.2

2870, Legends of the West Error Sheet with Blue Holder - Stuart Katz

$ 83.55 $ 50.13

1571, HUGE Color Shift ERROR 10¢ Women's Year Stamp With Normal MNH Stuart Katz

$ 28.6 $ 17.16

2484b, 29c Wood Duck - Misperforation Booklet of Two Error Panes - Stuart Katz

$ 87.95 $ 52.77

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

$ 66 $ 39.6

1002, Mint NH 3¢ Misperf Shift Error Block Showing Gutter - Stuart Katz

$ 145.19 $ 87.11

1568a, 10¢ Bicentennial DRAMATIC COLOR SHIFT ERROR BLOCK OF 4 WoW

$ 39.6 $ 23.76

1841a, 15¢ Misperfred Right Down The Middle Error Block Of Four + Stuart Katz

$ 110 $ 66

US Postage Scott #1818 "B" Eagle 18c Misperfed Vertically & Horizontally Error

$ 11.25 $ 6.75

1146 4 cent WInter Olympics with Plate Obstruction

$ 17.55 $ 10.53

US EFO Scott #1895 20c Flag over SCOTUS Coil Misperf 7 singles USED!!

$ 9.24 $ 5.54

2276, MNH 22¢ Fireworks With Large Red Color Shift Great EFO - Stuart Katz

$ 39.6 $ 23.76

1582 2¢ Freedom to Speak misperf MNH

$ 3.07 $ 1.84

1592 10¢ Justice misperf MNH

$ 2.63 $ 1.57

Error 1729a Imperforate Pair Mint NH OG Extra Fine SCV LB

$ 35.2 $ 21.12

1995 U.S. #2967 Marilyn Monroe Plate # Pair; Missing 'Star' Perforation at Top

$ 5.72 $ 3.43

CE2 MNH Plate Strip of 10 with the Eagle Vignette Shifted Upward / EFO

$ 35.2 $ 21.12

1329, Mint NH 5c - RED COLOR SHIFTED TO RIGHT ERROR PAIR - Stuart Katz

$ 39.6 $ 23.76

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

$ 3.52 $ 2.11

5593, Red Color Shifted Up Pane of 20 Stamps NDC - Stuart Katz

$ 259.6 $ 155.76

1213c miscut tagged 5c Washington booklet pane slogan 3 MNH

$ 3.51 $ 2.1

US #1426 – 1971 8c Missouri Statehood MNH mint nh EFO ink stripe

$ 2.63 $ 1.57

AOP #1304C 1966-81 5c Washington misperf error MNH

$ 4.4 $ 2.64

807, MNH 3¢ With Wide Paper Fold Error In Block of 20 Stamps - WoW - Stuart Katz

$ 660 $ 396

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