Trading Game! Are you in?

The other night, we went to a friend's house for her birthday party.  It was at her parent's casa, so they had a fire going, and a good time was had by all.  Her dad was there, and I remembered he collected baseball cards.  I struck up a conversation with him about it, and he invited me in to show me some of his stuff. He mentioned he largely got out of the hobby, but still had a few items.  Notably, from what I recall, a 1968 Topps Nolan Ryan / Jerry Koosman rookie - autographed by both!, a 1999