Jenna, don't sell the fone to her. honestly ive had experience with bidder from nigeria who join the same day and have no feedback. they are SCAMMERS, they will probably not pay or retract the payment and get you to send to phone. I think your making a big mistake if you sell it to her, by the way go back and check if she still has her account as most of them close their accounts after winning auctions. It happened when my OH was selling his PSP.
just make sure when you are selling stuff on ebay that you wont ship abroad, or to certain countries (nigeria) or you wont sell to those with zero or negative feedback.