Has anyone done this? My Acura TL needs its factory tires replaced. I am looking at Michelin Premiers which are pretty expensive. The other day while searching on Amazon, I saw that the ones in my size were available on Amazon, sold by the Pep Boys. (and I didn't even know they were co-branding with Amazon. ) The price was a good $40 a tire less than Tire Rack, and much less than I had seen them anywhere else. I didn't pull the trigger because I am waiting for the next credit card cycle. Well, guess what, I went back on Amazon a few days later, and there's no mention of such a deal. What gives, do you think?