Liquidation.com is pretty much like a directory - they have a great mix of suppliers, some good others not so good. This site is also considered by a number of sellers to be a good source of inventory provided you find a reliable supplier.
But they have been known for the exorbitant shipping fees. As commonly suggested if you are located reasonably near the supplier ask if you can just pick-up your order yourself. Most suppliers will let you do local pick-ups. To arrange your shipping preference it is best to get in touch with the supplier/seller.
Tip: Get to know the seller/supplier your are buying from - do as much research as you can before actually buying from them.
Hope this helps.
PS - There are a number of posts on our forum about Liquidation.com and I suggest reading them, you can find them by using our 'search the forum tab (on the upper left corner)