I looked at his Facebook page and he has a lot of stuff.
I think it would depend on how much you are spending. If he says "friends and family" PayPal, walk away.
I don't like that he isn't listing a location, although Barto, PA shows up on an old trailer. I also don't like that I don't see a lot of the same background in the pics. In other words, a Dodge fender is leaning against a brick wall, but the Ford fender is next to a sheet rock wall. Some of the cars he's selling are in different shops etc. That might just be coincidence, but I'd be a little cautious. I'd also like to see a real name.... and I don't like that his email address has Mopar spelled incorrectly.
These are all just some quick looks at it. Possibly a question to ask is if he's going to Carlisle next week and where (if) he's going to be set up. Someone here could check out his parts and report back.