I've removed a few listings from my Dealer List page, most notably Eagle Sports. I've received reports that they were selling items with "J. DiMaggio" COAs, and at least one of the items was submitted to PSA/DNA and came back as a forgery. As you may know, "J. DiMaggio" COAs (no relation to the baseball player) were among those exposed by the FBI a few years ago in Operation Bullpen.
Zarelli Space Authentication
Steve Zarelli Space Authentication provides professional and accurate authentication of astronaut and aviation autographs.