Sounds pretty sketchy. Who do these people say they are? What was their pinside user name when they were active? How did they find your WTB ad if they aren't active on Pinside? Can they write today's date on a piece of paper and send the picture of the game with that? Can they provide pics of any specific areas that might not be shown in the pictures they did send? Can they talk by phone? My guess is they disappear or become unresponsive when you make it clear you aren't any easy mark.