You have to remember that it is goodwill. It is all stuff that was donated, because it is no longer wanted, or it is broken. So yes you do have to be really careful, and know the value of what you are bidding on. I do not bid to high on anything cause chances are good that it is going to have problems. Then there is the shipping and handling, you have to think about if the item is worth what they charge to ship it. But it is fun to look and see what someone elses junk looks like.