I thought this post at the Unclutterer blog was really interesting - it talks about a way to reduce your book clutter by selling your books to Powell's online. You enter the book's ISBN and the site offers a price for the book. If you are happy with that price, you'll get prepaid media mail shipping labels to send the book (for free), and then you'll get store credit. The only downside to Powell's is that the site offers free shipping (when you then use that store credit) on orders of $50 or more. I am a big fan of Amazon's free shipping w/ orders over $25... And a side note on the free shipping - this site lets you search only for items w/ free shipping at Amazon, eBay, Best Buy, etc.: Free Shipping On
