I buy cheaper used cars. Usually a small PU. The last 3 bikes I purchased were all new. 2 from the LBS and 1 from a big box store in NJ.
BTW: the Murray from the big box didn't last 3 days. But it was cheaper than renting a bike while I was there. Considering that the big box gave me a refund on the broken bike it was basically rent free for 2 days.