The last one we bought from a highly reputable and recommended used car dealer (not in the DC area). I was a little skeptical of going to a used car dealer but we got a decent deal on a late model, low mileage suv. We've had it for about 6 months and it's been a great vehicle. Exactly what I wanted.
Almost identical story here except we’ve had the SUV for almost a year and a half. From Auto Lenders in NJ. Found it on cars.com / autotrader.com where I had been looking for a specific model/color/package with less than 20K miles.
Our last car was found the same way but we bought it used from a new car dealer.