I know a "rich" person that drove a Geo Storm. Money sure as hell doesn't mean they actually DID anything to the car.

You are leaving out anything performance-related that would help justify your statement of "300 hp" which appearantly, is the only real selling point.

It's a swapped engine, so who did the work, when, how long ago, and what did they do?

I wouldn't trust a swapped engine unless it was by a reputable person/shop. Unless the price was low enough to justify paying for something unknown. Otherwise, you're paying for a car that you will have to work out any kinks.

WHY do people swap engines and then sell the car? Isn't it a bit of a hassle to do all that, just to sell it for less than the car is worth?