Sprint Selling Certified Pre-Owned Phones

Wow so many Pre's what could poss be wrong that you have had to have so many of them? That phone is reported to have the least probs in general of Sprint's smartphones. Mine is just about to arrive from Ebay its a refurbished one & I cant wait to get it my freind has the Pixi and he said web os is the best and easiest os to use and iv'e read mostly positive things abt the Pre to bad it didn't catch on more as planned mostly because of Android.