Where can one buy a used 1GB mp3 player?

There are many websites online that sell MP3 Players but not all can be trusted. On average people tend to purchase them from second hand websites like Amazon where you get all information about a product or bidding websites like ebay. There are numerous websites that sell electrical products but you want to always make sure that everything comes with the MP3 i.e. headphones, warranty, recipe along with knowing the manufacturer.