The biggest problems I see with liquidation.com is the fact that the sellers pay higher fees to liquidation.com. I contacted them about selling lots of merchandise for the company I work for. And I believe they said it was 5% or $200 whichever is higher. Thats just to sell the item. Then they mark up the freight and the end user pays the freight and they keep the difference. Also with fees that high they wouldnt want to discourage bidders from bidding. I myself have lost money on a few lots and made money on others. But in most cases the manifests, listings and photos are very sketchy or in some cases arent the actual photos.
Also submitting a question to a buyer is another problem. When you submit a question it goes through liquidation.com staff ifrst. Then if it is deemed appropriate then it is passed on to the seller. Their response is then passed through the staff and on to the buyer. That way you cant share contact info or anything else.
Im sure there is some other issues with them. But there are alot of places that sell material of this type, its just finding a good one. i am sure all companies that deal in items like this have their share of problems and its not just liquidation.com