Now it's time to bait him and string him along. Ask for more parts, make up stuff and have him tell you he has it.
I did this once as a test. I had a Who Dunnit and needed a few boards for the slot reels. Within minutes of putting up my want ad I had a response. That was first red flag. Email came in within minutes, 2-3. Said he had all 3 boards and some slot reels. So, I was instantly excited, price wasn't bad $60 a board if I remember right. So Now, I asked for the 'Bushing converter Mech that goes to the right of slot assembly". (This does not exist, I made it up). About 5 min later, Wow, he has one, $150 bucks. I laughed and Laughed. So, for several days I strung this guy along. I wanted to send a check or cash in mail, needed address, never got it.