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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Ckstamps : Us Stamps Scott#79 3c Rose A-grill 1867 Used 2014 Cv$1500 W/ Pf Cert.U.s. #132 Rare Unused W/cert - 1875 90c Lincoln Re-issue ($1,500)"extra Rare Letter Frm.us Gb Austria Lombardy With Us/gb Stamp Mix W/certificateCkstamps: Us Stamps Scott#245 $5 Columbian 1893 Used 2014 Cv$1300 W/foreign CertUs Stamp #534b Offset Type Vii (7) 2 C Carmine, T3 Schermack Perfs, W/ Pf Cert!!Ckstamps : Us Stamps Scott#243 $3 Columbian 1893 Used 2014 Cv$900 W/foreign CertCkstamps: Us Stamp Collection Scott#350 Mint H Og With Pse CertCkstamps: Us Stamp Collection Scott#519 Mint Nh Og With Weiss Cert Cv$850Ckstamps: Us Stamp Collection Error/efo Scott#1856d Mint Nh Og Weiss Cert $1500Ckstamps: Us Stamp Collection Scott#449 Used With Pf Cert Cv$600Ckstamps: Us Stamp Collection Error/efo Scott#2718a Mint Nh Og Proof Weiss CertU.s. #28 Choice Used Vf W/cert - 5c Red Brown ($1,200)Scott # 386 , Us 1910, Coil 2c. Never Hinged. Cat: $1300. With Cert.U.s. #404 Scarce Unused Xf W/cert - 10c Pan-pacific, P10 ($725)Ckstamps: Us Stamps Scott#599a-599 Line Strip Of 4, First 2 Are #599a Mnh W/certCkstamps: Us Stamp Collection Scott#456 Mint H Og Pair With Pse Cert Cv$550Ckstamps: Us Stamp Collection Scott#446 Mint H Og Pair With Pf CertScott # 362 , Us 1909, Bluish Paper 6c. Never Hinged. Cat: $3000. With Cert.U.s. #c13 Choice Mint Vf W/cert - 1930 65 Graf Zeppelin ($180)Scott # 291, Us 1898, Trans Mississippi 50c. Mint Og/ph Vf 80 With Pse Cert 2014-15 Canvasback Duck Stamp Mint Plate Block W/bonus Cert Of AppreciationCkstamps: Us Stamp Collection Scott#528 Plate# Block.6 Mint Nh Og Weiss CertU.s. #544 Rare Used No Cert - 1c Green, P11 Mr Fancy Cancel Scott R33 Certificate Used 10c Cv$350O57 Vf Used Pse CertDr Jim Stamps Old Us Revenue Scott R44 25c Certificate Multiple Used Free Ship1868 Vermont Certificate Of Deposit Rn-b24Drbobstamps Us Scott 67a Used Scarce Stamp With Pse CertificateSouvenir Show Card "lobex '86" Long Beach Ca "ten Dollar Gold Certificate"Mr Fancy Cancel Scott R24 Pair Certificate Used 5c Cv$351910 4c CertificateDrbobstamps Us Scott 8 Used Very Scarce Stamp With Aps Certificate1940 U.s. Postage Stamp - Mint Ognh - Scott 901 - Pse Cert. - Imperf B/t PairOld Used U.s. Internal Revenue Stamp Sc#r44c Certificate Item #846U.s. # 22 Used Weiss Cert F-vf Very, Very Tiny Corner Crease Cat$500Mr Fancy Cancel Scott R7a Certificate Used 2c Cv$17.50#5608 Revenue Fiscal Fiskal Certificate PairAs&s's Us #r44c Handstamped Certificate Revenue [e505]*Old Used U.s. Internal Revenue Stamp Sc#r44c Certificate Item #850