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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Most watched eBay auctions    

Us Stamp:#122 90c Carmine & Black 18​69 Pictorial Issue Used Stamp + CertificateU.s. #291 Used Superb App W/cert - 1898 50c Trans-mississippi ($200)U.s. #271 Mint Nh Vf Beauty W/cert - 6c Dull Brown ($360)U.s. #1a Used W/cert - 1847 5c Dark Brown ($850)Ckstamps: Us Stamps Collection Scott#191 90c Perry Mint H Og Pse Cert Cv$2000U.s. #27 Scarce Used W/cert - 5c Brick Red ($1,600)Scott #1a Used Near Gem With Cert. Cv:$ 800. ....................read DetailsU.s. #22 Scarce Mint W/cert - 1c Blue, Type Iiia ($2,400)U.s. #214 Choice Mint Vf/xf W/cert - 3c VermilionUs Scott # 17 Used / F-vf With Philatelic Cert; Scv $250.00U.s. #18 Used W/cert - 1c Used, Type I ($550)Ckstamps: Us Stamps Collection Scott#573 $5 Mint Nh Og With Pse Cert Cv$190Scott 647, 2c Hawaii Mint Xf/superb Jumbo Nh Graded Pse Cert, Only 1 "j" Higher!Us 30c Perf 15 1857-61 Sc 38 H Cat Value $2150 With CertCkstamps: Us Stamps Collection Scott#723 6c Mint Nh Og Pse CertCkstamps: Us Stamps Collection Scott#86 1c Franklin Used Pf Cert Cv$450Ckstamps: Us Newspaper Stamps Collection Scott#pr5 5c Unused Ng Pse CertScott #r44 On Pennsylvania Salt Mining Company Stock Cert. - Aug 15, 1871 (pz46)Ckstamps: Us Newspaper Stamps Collection Scott#pr81 1c Mint H Og Weiss CertCertificate Of Appreciation With Rw80 $15.00 Common GoldeneyeCkstamps: Us Newspaper Stamps Collection Scott#pr57 2c Mint H Og Weiss CertUs Sc 1 1847 Red Brown Vg 50 Pse Cert, Blue Paid, Crease Bottom Right. Cv $495Ckstamps: Us Stamps Collection Scott#85 3c Washington Used Crease Pf Cert $1050Us Scott C1 Mint Graded Xf 90 Pse Certificate 1918Tks Stamps:pse Cert, Us Scott C11, Xf-s, Graded 95, 1928, 5c Beacon On Rocky MtnTks Stamps:pse Cert, Us Scott 749, Xf-s, Graded 95, 1934, 10c Great Smoky Mtns.Ckstamps: Us Newspaper Stamps Collection Scott#pr59 4c Mint H Og Weiss CertUs # R24 Used 5c Certificate Mohawk Valley Bank Feb 7 1866 New York RevenueCkstamps: Us Newspaper Stamps Collection Scott#pr62 10c Mint H Og Weiss CertMr Fancy Cancel Scott 883 Mnh 10c Xf-sup 95 Certificate #2338#494 Used Coil, Well Centered With Fault Pse Certificate # 01262524Ckstamps: Us Stamps Collection Scott#73 2c Jackson Mint Part Og Crease Aps CertUs Duck Stamp Certificate Of Appreciation, 1995Us Duck Stamp Certificate Of Appreciation, 1991Us Duck Stamp Certificate Of Appreciation, 1992Us Duck Stamp Certificate Of Appreciation, 1990Us Duck Stamp Certificate Of Appreciation, 1993Us Duck Stamp Certificate Of Appreciation, 1994707, Washington Bicentennial On A Certificate Of Mailing UnusualDr Jim Stamps Old Us Revenue Scott R24 5c Certificate Used Blue CancelUs Bob Revenue Stamp R44a CertificateDr Jim Stamps Old Us Revenue Scott R44 25c Certificate Used No ReserveDr Jim Stamps Old Us Revenue Scott R33 10 Certificate Used Thin Blue Cancel