Depends on what you like to do. When I lived in the States, I use to buy (by the pallet) clearance and returned merchandise (I only bought electronics) from stores like Walmart, Sears, Target, Best Buy etc. I would then list each item on ebay and made a rather nice profit doing it. I started out buying just 1 pallet, listing everything, then buying 2 pallets, etc. Before I knew it, I was buying 1/4 a container, then 1/2 a container.
I would buy the merchandise from companies like
http://www.westcoasttrading.com. I loved the business.