Professional Sports Authenticator (PSA)

parent coCollectors Universe

psacard.com

Beckett

regionDallas, Texas

beckett.com

House Canary

housecanary.com

Longleaf Partners

longleafpartners.com

MPAC

regionCanada

mpac.ca

OPTEON (Apex)

regionAustralia

opteonsolutions.com

Pendo Management Group

regionLee's Summit, Missouri

pendomanagement.com

TerraValue

terravalue.net

Topps

regionBrooklyn, New York

topps.com

United States Appraisals

regionOverland Park, Kansas

unitedstatesappraisals.com