Liquidation.com is not a liquidator, it is a liquidation clearance auction site.
The people listing their items for auction are all independent, and therefore you should research each one well before placing a bid.
Plenty do OK from sourcing through the site, however plenty do not!
When you are choosing to buy liquidated products at an auction price rather than a set price, you really should make sure you know the type of stock you are bidding on, and the true value of the stock or you are running the risk of buying garbage, or paying above market value.
If you research the stock, research the price by seeing what real liquidators are selling it for, and then ensure you are dealing with a trustworthy seller, then you will be in a much better position to make sure you get the best deal!
The other key factor you need to take into consideration is the shipping price, and this site is well known for having some of the worst shipping prices out there, so even if you win the lot at a great price, shipping can still burn you!