I am incredibly nervous about buy an Iphone off of eBay considering this is my first purchase on the site and a pricey one at that. I was wonder does this seller seem legitimate to you?http://www.ebay.com/itm/Apple-iPhone-5s-16GB-WHITE-GOLD-Sprint-CLEAN-ESN-PERFECT-CONDITION-/251982964072?pt=LH_DefaultDomain_0&hash=item3aab5ae568