5 – Your own home. Last, but not least, is your own home! Believe it or not there are many items that are lying around your house that you have most likely forgotten about, and many of these are absolute treasures for online auction sites. Start by checking in your closets, and then take a look in your garage, attic and basement. If you find a used item, check to see if other similar items are already being sold as used online. Many customers don’t mind if an item is used, because they simply want to collect it. With this way, you will clean your home of unwanted stuff, and make some money at the same time!