I don't know if you want advice about buying a game from this forum. These guys break any sound advice rules for buying. Here are the staples to buying.
1. Never buy a game you havn't played at least 50 times to know if you like it.
2. Never buy something you can't see, play and pick up in person
3. Know your market. Look at what games of the same title actually sell for (not asking prices..selling prices) they are very different things.
4. Take someone with you that knows about games. Help you look over things, because things like chia boards, bad wiring, and other things the veteran would see, you probably will not. Plus they can help you break it down and move it out.