The 1961 Fleer Wilt Chamberlain, previously in an SGC 10 slab and purchased in a private sale via Goldin Auctions, has been crossed to PSA and received a Gem Mint 10 grade there as well Unknown ...

PSA is by far the largest grading company in the industry and cards that carry a PSA 10 grade can demand a significant premium on the market. The rate at which a player’s cards are graded can be ...