The biggest trouble with a site like liquidation.com is that you are dealing with individual sellers, and just as in any marketplace, there will be good and bad ones.
The site is well known as a dumping ground for cherry picked loads. That is when someone has purchased a large volume of stock from a liquidation source, and I mean a real liquidation source, not a site such as we are talking about here, and they then break that load down into smaller lots and throw them onto liquidation.com.
What happens is that before the smaller lots are advertised for auction, they are cleaned out of all the valuable items by the seller, then those items are sold elsewhere to cover the initial cost of the load and what ever the lesser products win at auction can be pure profit.
Not everyone does that, but a lot do, and if you are one of the unlucky ones buying one of their lots then you can end up with very little more than simple garbage.
I would never suggest anyone buy liquidated stock at auction if you want a regular supply. Deal with a liquidator or agent for you stock because it will be set at a flat price, which will more than likely be under any auction price paid, and you will be able to source a reliable constant supply.
Liquidation is quite popular with smaller sellers because they don't think that they can afford to buy larger lots direct, but they will usually end up paying more for the lot than they would through direct channels.
Bottom line, some say they do ok on the site, but a lot do seem to get burnt, find yourself a good liquidator and save all the hassles of not knowing what the hell you are getting, and never being sure of what the price is going to be!