1887-88, Washington, small die proofs of 2c in green and 3c in vermilion, printed on white wove paper, approximate size 29-30x34-35mm, no gum as produced, VF, C.v. $400, Est. $200-$250 (Image)

1894, John Marshall, $5 dark green, perforation 12, excellent centering, a part of ''REGISTERED'' cancellation, PF graded XF-90, C.v. $2,600 as VF and SMQ value $6,000, Est. $1,200-$1,500 (Image)

1920, Washington, 2c carmine, offset printing, type V, imperforate block of four, perfect quality, full OG, NH, VF, C.v. $850 as two pairs, Est. $300-$400 (Image)

1922-23, Definitive issue, 11c, 12c, 14c and 15c, perforation 11, set of four values in top or bottom sheet margin plate No. blocks of six, full OG, NH or LH (one stamp of block 15c), F/VF, C.v. $585, Est. $200-$250 (Image)

1938, Presidential issue, Franklin, ½c deep orange, left sheet margin block of 14 (7x2), two-line pre-cancel ''Mount Sterling. Ohio'', left block of 4 has inverted pre-cancel at top pair, bottom pair and block of 4 in the middle have normal position of pre-cancel, block of 6 at right without pre-cancel, full OG, NH, VF and a spectacular positional item, Est. $400-$500 (Image)

1990, Love, intact $5 booklet, 25c multicolored in two panes of ten, top pane has bright pink omitted variety, while second one is normal, full OG, NH, VF, C.v. $750, Est. $300-$350 (Image)

1991, Wood Duck, two $5.80 intact booklets, containing 29c stamps in two panes of ten, both have plate No.1111, each one imperforate between stamps with straight edge at top or bottom, perfect quality, full OG, NH, VF, C.v. $1,750, Est. $800-$900 (Image)

1996, Flag over Porch, two $6.40 intact booklets containing 32c self-adhesive stamps in two panes of ten, one booklet has die cutting omitted, the other one has vertical cut strongly shifted to the left, plate No.66666 orNo.11111 respectively, each stamp dated ''1996'' in red, backing paper intact, VF, C.v. $400 for the booklet with die cutting omitted only, Est.$200-$300 (Image)

1996, Christmas, Madonna and Child by Paolo de Matteis, $6.40 self-adhesive intact booklet pane of 20, die cutting completely omitted, backing paper intact, VF, C.v. $400, Est. $150-$200 (Image)

1996, Christmas, Madonna and Child by Paolo de Matteis, $6.40 self-adhesive unfolded booklet pane of 20, top seven stamps at the top with missing black engraved inscription due to strong shift of die cutting, while six bottom ones have this inscription printed at top and bottom, fresh and VF, the item is listed, but priced in Scott with ''-'', Est. $400-$500 (Image)

1960, First Automated Post Office, 4c dark blue and carmine, top right corner margin vertical pair, top stamp has carmine missing due to perforation shift, bottom stamp has inscription at the top instead of bottom on common stamps, full original yellow gum, a part of upper right margin was lost, still fine and rare undervalued error, C.v. $250, Est. $100-$150 (Image)

1968, Wood Ducks, 6c multicolored, right margin single with red color omitted, full OG, NH, VF, C.v. $350, Est. $150-$200 (Image)

1971, John Sloan, Artist, 8c multicolored, top right corner sheet margin plate No.33131, block of four, right stamps has red engraved color missing (John Sloan and ''8'') due to significant shift of all engraved colors to the bottom left, full OG, NH, VF, US Errors Cat. evaluates this error as rare, C.v. $2,000 as two single stamps, Est. $750-$800 (Image)

1972, Tom Sawyer, (8c) multicolored, a single with black and red (engraved) colors omitted, full OG, NH, VF and scarce, PF certificate for block of four, C.v. $1,000, Est. $300-$350 (Image)

1973, American Bicentennial issue, Postrider, 8c multicolored, a single with red color missing and green color strongly shifted to the top, full OG, NH, VF centering for this rare error, C.v. $1,300++, Est. $500-$600 (Image)

1974, Rural America issue, Wheat Fields and Train, (10c) multicolored, a single with blue and black colors omitted, full OG, NH, VF, C.v. $500, Est. $200-$250 (Image)

1973, Christmas Tree, 8c multicolored, bottom sheet vertical strip of three, plate No.34343 on the edge, imperforate between top and middle stamps, full OG, NH, VF, C.v. $225, Est. $100-$120 (Image)

1974, Horses Rounding Turn, 10c yellow and multi, a single with blue ''Horse Racing'' omitted, red color (US Postage 10 cents) shifted to the top, full OG, NH, VF, C.v. $500, Est. $150-$200 (Image)

1975, Space Exploration, Mariner 10, 10c multicolored, right margin single with red color omitted, full OG, NH, VF, C.v. $275, Est. $100-$120 (Image)

1975, Liberty Bell, 13c brown, booklet stamp, vertical pair imperforate between stamps with additional incomplete pair at left, these error caused by a foldover (did not affect the item), full OG, NH, VF and very rare, only a few such errors exists, not creased item is probably unique, C.v. $1,500, Est. $600-$800 (Image)

1979, Rush Lamp and Candle Holder, $1, tan, orange and yellow colors omitted, right sheet margin block of four with USPS imprint, full OG, NH, VF, C.v. $700++, Est. $250-$300 (Image)

1981, 13-Star Flag over the Independence Hall, 13c dark blue, red and brown red, right sheet margin imperforate block of four with ZIP imprint on the edge, tagging omitted, full original even gum, NH, VF, imperforate block has C.v. $200, the same error with tagging omitted priced with ''-'', Est. $200-$250 (Image)

1977, Lindbergh Flight issue, 13c multicolored, bottom margin vertical imperforate pair, full OG, NH, VF, C.v. $700, Est. $200-$250 (Image)

1978, Eagle ''A'' (15c) orange, top margin vertical strip of three, horizontal perforation is missing between 1st and 2nd stamps and placed diagonally between 2nd, 3rd and at the bottom, full OG, NH, VF, C.v. $500++, Est. $150-$200 (Image)

1978, Wildlife Conservation, Owls, 15c multicolored, bottom left corner sheet margin se-tenant plate No. 38800 block of six (2x3), containing block of four and pair of No. 1762-63, black and brown engraved colors are strongly shifted to the left, full OG, NH, VF and a spectacular item, Est. $150-$200 (Image)