Books.

Even though we get a generous discount at the store, books are still expensive, especially when you read a few a week.
Which is why Bookmooch is my new favorite website. I've already unloaded a bunch of books that I no longer need or want and I have seven books on the way.
Since I'm all about ridding myself of clutter these days, I'm thrilled. And it's a better deal then selling used books to a store--I'd rather have another book than $2. Plus, there's the added thrill of getting something for free (postage being the only money involved).

And yes, I'm avoiding the irony involved with my employment=selling books and Bookmooch=receiving books without involving a bookstore or payment.
Shhhhh.