| Bagger's Auctions |
| Brockelman Auctions |
| Classic Auctions |
| Clean Sweep Auctions |
| Collect Auctions |
| EAC Gallery |
| Fanatics Collect |
| Golden Age Golf Auctions |
| Goldin Auctions |
| Graham Budd Auctions/Sotheby's |
| Heritage Auctions |
| Huggins & Scott |
| Hunt Auctions |
| Iconic Memorabilia |
| Inside The Park |
| Julien's Auctions |
| Leland's |
| Love of The Game |
| MEARS Online Auctions |
| MeiGray Auctions |
| Memorabilia Experts |
| Mile High Card Co. |
| Mullock & Jones |
| Premier Auctions |
| PriceRealized.com |
| PSA-Graded Auction Prices Realized |
| Robert Edwards |
| RR Auction |
| SCP Auctions |
| Sirius Sports Auctions |
| Sotheby's |
| Sterling Sports Auctions |
| The Golf Auction |
