I had had a lot of luck with Carmax. The cars aren't perfect, by any stretch, and usually need something (like a transmission service) but their process is smooth, nothing beats being able to test drive several vehicles and they stand by their product and honor things that need to be addressed at time of sale. Over the years I have bought from them 4 times (three from Waterbury and one from East hartford), I have never been disappointed about how I was treated.