I am a member of "The Bench," "Sports Card Forum," and "Non Sports Card Forum." They are excellent trading groups, the best on the web that I have come across. I am mainly a Lou Gehrig collector and set builder but also try to pick up Hall of Fame autos and game used jersey/pants/uniform cards (no bats except Gehrig). No deal is too small. If you need anything on my site just shoot me a message.
Here is a link to my photobucket. All of my GU and auto cards are scanned on there. It is up-to-date as of 6 November 17.