I bought a car on Ebay once...and to be honest, never again, even though my experience was good.
I bought a '96 Acura 3.2TL in Sept of 2004 on eBay for only $8000 plus $800 shipping to Winston-Salem, NC from Houston, TX. The car was in excellent condition with only 62k miles on it. I had the car inspected by a 3rd party in Houston, which costs me $150. They said the inspection was good, but when I received the car, the ABS light was on. So we took it to the shop and found out the accumulator was bad plus the master cylinder was leaking so I dumped $700 to fix it. I did a little research and found that it's a pretty common problem with Legends and 1st gen TL's so I let it slide.
I had soooo much fun with that car when I had it but I had to sell it because I needed something that gets better gas mileage so I sold it with 99k miles on it. That car was the best car I've ever had. My current Accord is what I replaced my beloved TL with. I put a lot of TLC into that thing and it looked just like it rolled off the showroom floor when I watched the new owner drove it away.