Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7)
It doesn't matter where you purchase it from, as you will still receive a 12 month warranty from Apple, and will need to deal with them anyway should you have a problem with your iPhone.