It's a chance you take I guess. It would sucks to get nothing but empty towers or monitors but until the seller guarantees that every part is in every item I would be cautious. On a lighter note I bet that an auction that guaranteed that every part was present would make a lot of money at auction but would lose it by having to go through every tower and if they did that then they might as well scrap it while it's apart. Anyway an as is auction is just that, an as is auction. You will definitely not have any repeat customers with that strategy though.