As with coins and baseball cards, in recent years some stamp collectors have started submitting their stamps to grading agencies for "expertising". Some of the well-known organizations which issue certs for stamps include PSE, Weiss, PF and APS.

Some stamps will be sold with an existing cert, and other sellers will offer the buyer the opportunity to have a stamp graded and examined by a third party before completing the transaction. As with any collecting purchase, cert or not, caveat emptor!


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Us Stamp:#459 2c Carmine 1914 Coil Imperf Mnh/og Single Stamp + CertificateDrbobstamps Us Scott #101 Sound Very Scarce Stamp W/ Pse Graded Cert Cat $2250 Ckstamps : Us Stamps Scott #243 $3 Columbian 1893 Mint H/og Cv$1600 W/aps Cert.Mr Fancy Cancel 63 X4 On Cover Carrier Rate New York Pf Cert As Deep BlueUs Stamp:#454 2c Red Type Ii 1914-16 10p. Mnh/og Coil Stamp $150 + CertificateUs Stamp:#427 4c Brown 1914-15 Slwm 10p. Mnh/og Stamp + Certificate Us Stamp:#431 8c Olive 1914-15 Mnh/og Stamp + Certificate Pse Xf90Us Stamp:#424 1c Green 1914-15 10p. Mnh/og Stamp + Certificate Pse Xf Superb 95Us Stamp:#418 15c Gray 1912-14. 12p. Mnh/og Stamp $190 + Certificate Us Stamp:#432 9c Salmon Red 1914-15 Mnh/og Stamp + Certificate PfUs Stamp:#433 10c Orange Yellow 10p. Mnh/og Stamp + Certificate Pse Xf 90Us Stamp:#442 2c Carmine 1914 Flat Plate 10p. Coil Mnh/og +certificate Xf-sup95Us Stamp:#429 6c Orange 1914-15 Slwm 10p. Mnh/og Stamp + Certificate U.s. #279bd Choice Mint Nh W/cert - 2c Red OrangeUs Stamp:#457 4c Brown 1914-16 Coil Perf. 10 Mnh/og Pair Stamp + Certificate Us Stamp:#416 10c Orange Yellow 1912-14. 12p. Mnh/og + Certificate Us Stamp:#426 3c Violet 1914-15 Mnh/og Stamp + Certificate Pse Xf 90Drbobstamps Us Scott #310 Sound Mint Og Hinged Stamp With Pf Certificate Us Stamp:#455 2c Carmine Type Iii 1914-16 10p. Mnh/og Coil Stamp + CertificateNystamps Us Stamp # 112 Used $150 W/certNystamps Us Stamp # 31 Used $1250 W/certUs Stamp:#434 11c Dark Green 1914-15 Slwm 10p. Mnh/og Stamp + Certificate Scott 96 10c 1868 V Thin Paper Jumbo Graded Certificate Finest Known! No ReserveUs Stamp:#443 1c Green 1914 Flat Plate 10p. Mnh/og Stamp + Certificate#305, 6c Garfield, Xf-og-nh, With 2005 Pf Cert., Scott Is $150 - Rupp BrothersUs Stamp:#458 5c Blue 1914-6 Coil P.10 Mnh/og Stamp $150 + Certificate Ckstamps: Us Stamp Collection Scott#239 Unused Regum With Aps CertUs Stamp:#428 5c Blue 1914-15 Slwm 10p. Mnh/og Stamp + Certificate Us Stamp:#448 1c Green 1915 10p. Coil Mnh/og Stamp Pair + Certificate#1 Used Light Black Cancel With Pf CertificateCsa Confederate 11 Laid Paper Mint 10c 1863-64 Rare Apex Certificate No Reserve!Scott 239 Used Jumbo 30c Columbian 1893 Graded Pse Cert 90j Cv$500++ No Reserve!Scott 226 Mint Nh 10c 1890 Large Margins! Pse Certificate Cv $525++ No ReserveScott 387 1 Cent Coil Line Pair Forgery Made From 383 Pair ~ Weiss CertificateNystamps Us Cut Square Stamp # Uy10 Mint $450 W/certDr Jim Stamps Old Us Revenue Scott R44 25c Certificate Used No ReserveNystamps Us Cut Square Stamp # Ux41a Mint $85 W/certUs Stamp Scott:#92 - 1¢ Used Pen Blue Cancel Blue F Grill Certificate Included #10a With Pse Cert - Nice Pos 17l0 Cv$160.00Nystamps Us Official Stamp # O81 Mint Og H $400 W/certUs #11 Margin Singles On Two Covers, One With Cert.Dr Jim Stamps Old Us Revenue Scott R24a 5c Certificate Imperforate Used NrUs Jefferson 5 Cents Red-brown, Scott # A26 Not CertificateDr Jim Stamps Old Us Revenue Scott R24 5c Certificate Used No ReserveDr Jim Stamps Old Us Reveneu Scott R44 25c Certificate Used No Reserve