I have 4 Bridgestone Potenza RE050A in size 215/45-18. These tires came on our new Mazdaspeed 6 that we bought tonight. Being summer tires, I just ordered 4 new Pirelli all seasons for it and will have them swapped out by the end of the week (should be less than 200 miles on the Bridgestones). Tirerack has these listed for $199 each. Asking $550 + freight (but might be open to offers and you can pick them up in Columbus, OH if you'd like).
trackbird(at)columbus dot rr dot com