samsclub.com also has some pretty decent prices or I do shop a bit on E-bay, if you are careful and make sure you only choose a seller who has TONS of (like hundreds if not thousands) good comments and very few bad ones and you'll be safe. Or of cource t-mobile.come is your SAFEST bet, you can log into your My T-mobile account to see what sort of discounts you can get for handset upgrades...otherwise you can take advantage of the fact that T-Mobile uses the SIM cards and pick you phone on e-bay.