I'm worried about some of the new (resale) listings in particular. New (resale) condition screams to me refurbished. In which case who knows who's done the refurbishment. Apple? Joe down at the corner store? Then I worry what if it's a "frankenphone" with aftermarket parts, including a Chinese third-party battery. Basically, I'm looking for reassurance from those of you who've made successful purchases from Swappa and got the genuine article.