Does anyone have a ton of books? New $ stream!

Not sure where this one goes, please move it if it goes somewhere else.....
Always looking for ideas to make extra money when prices are down, does anyone else sell books?
Similar to sellers for E-waste on here, i found a company that sends you a shipping label in advance. I've been using powells.com and getting $50-100 a month with a little extra time spent.
Up at the top of their site click on "Sell Your Books" I believe, then choose "Sell Online". You enter ISBN numbers off the book in the box and they will tell you how much they will pay you (either store credit or via PayPal). Not a quick return, it usually takes 3 weeks or so. Not great for old books and they have to be in great condition to count, but I find books all the time by the boxfull. Sometimes I can even score them for a quarter at yard sales or thrift stores and sell them for a buck or two. They are located in Portland, OR and they buy at their store as well.



So give it a try! Let me know if you win big!