How can you tell on the Ty Cobb glove sign? I am comparing it to the one on the Heritage website, and it looks pretty good to me. Sizes are similar. Discoloring of the checkerboard could be because of sunlight. Obviously, if I was selling a $20k item I wouldn't do it on ebay, but still, I can't tell how you determine it's a fake.
https://sports.ha.com/itm/baseball-c.../a/703-19543.s