I have been buying lots from Liquidation.com for about 2 months. Make sure you read the manifest carefully, check prices on amazon/ebay, expect that some toys will come in broken boxes but they will be perfectly fine, plan that 3-5 items in your lot will be completely broken (usually glass or a foot off a toy), and you will have a few will need minor repair.
I am able to go to one of the pickup locations and get my lots directly from the warehouse. If you can do this, I suggest it. You are then able to look through all of your items - yes, it takes time - and they will reimburse you for the items that are broken/damaged. You must do this before you leave.
I am amazed at how much money I can make reselling these items. Even with the damaged items, I can often pay for my entire lot by selling 2-5 items; after that, everything else is profit! Sometimes you can get a great deal!
Our warehouse staff is great. They are very friendly and helpful. I've never gotten a rude rep on the phone, either.
If you want to try this, get one lt to start off with. I find that household goods are great sellers at yard sales and on ebay.
Good luck!