99 DeVille

I am looking for a commuter car. Thanks to cash for clunkers prices for used cars are higher than they used to be. After searching crags list the best deal I can find is a 99 DeVille for 3500$. It appears to be in great shape and has 153,000 miles on it. The guy that is selling it lost his leg and cant get in the car any more.
Am i crazy for even looking at a GM product? I know these engines seem to have a bad rep for blown head gaskets. I will be honest this is really the only thing preventing me from purchasing this car. Any of you guys had experience with these engines?