I recently listed an extra PSP I have on craigslist, and got a response from a woman who wants me to ship it to her through her USPS account. Since I have never sold anything online, I wasn't sure how it works ... and when I emailed her to ask her response was really confusing. Does anyone know how shipping through a USPS account works? She asked for my contact info, stating that she would send payment, but that she would receive the item before I would actually receive the payment? At first, I thought she would want to ship it through USPS because you can track items that are shipped through them...(I looked it up on their website). If anyone can clear up how the system works, I'd be really appreciative!