I purchased a Motobecane from Cycle Spectrum (against ALL better judgement) because it weighed something like 15.6lbs with pedals, and cost a mere $1100. I ride it for about 3 days, clocking maybe 150 miles, and notice my wheel was rubbing on the chain stay. Wheel was dished improperly, and I never noticed it at the store.
I bring it in, and the guys there tell me "We don't work on bikes, too much liability." I almost fall out laughing. I had the Trek shop down the street redish it for $15, then promptly sold it on ebay before anything REALLY broke and I was out of luck.