[mrreality68]

Most auction houses do a pretty good job with the descriptions. The main issue is that someone should proof read them to ensure they are accurate and match the pieces. Especially as the values of many of these cards are spiking as well as a good history and description is needed for all the "new Money" and new collectors coming in.
They may know the players they are buying or not but may not know the difference in the rarity of 1 ie Mantle Card vs another Mantle Card