When I bought our Mustang the seller had it up on eBay but it didn't meet his reserve. We worked out a deal off eBay and agreed to meet in Madison, Wisconsin to purchase the car. I brought $10,000 cash with me. We were going to meet at a McDonald's but decided to meet at a rundown gas station on the freeway instead. I wasn't nervous about the transaction until we were on the way home. I thought "Man, this guy could have hired someone to be waiting there and when I went to get the cash from our car the guy could have just bopped me over the head, took the cash and ran!"
I did make him sign the title over and complete all the necessary paperwork before I gave him the cash, though, so I guess I still would have owned the car. The thing is the guy knew I had $10k in cash with me and it could have ended up pretty messy!