I'd have one of my my trusted mechanics look at them. If the seller won't allow the mechanic near the car, then forget about it. It's impossible for us, out here in YahooLand to look at the car for a proper inspection.
As for a repo, there is often something terribly wrong with a repo, but that's just from my own experience. I had to spend $4000 extra to get the warped front end straightened out. Your good mechanic might be able, for about $100, to save you from such grief.