Goodwill has gone global! They have a website,where you can bid on stuff, they list. They get incrediable donations and they give you the chance to bid. It's just like ebay,you have to have a user name and password. Make sure you have a credit card on file,so when you win something you can pay quickly. There are many different locations of Goodwills,who are participating. Like las Vegas,Los Angeles, and many other towns. They list new items daily and theres so much to see. Here's the link : http://www.shopgoodwill.com/
Tip one for bidding : I would watch items for a while, to see how much the item is going for. I usally wait till the day the item is ending,before I place a bid. I get so tired of these people bidding the first day and making the price go sky high. If you have the paitence to wait till the day the item ends, then bid, you will get it for a better price.
Tip 2: See what else the seller is selling. They will combine shipping and it will save you money. Also, email seller with any questions,they will help you with whatever you need. Sometimes asking for more details on an item will help you to determine if you want it.
Also on my blog list there's a site /blog called : Wow Goodwill ! Here's the link http://goodwillsp.wordpress.com/ This blog has alot of info on how to refurbish used items,what's out there in the goodwills and so on.
So go out there and let me know if you find anything great !