It's not being cheap, it's being green

Why buy it when you can rent it? You can also make money on stuff you don't use much. If you're not the trusting kind, you can set up a security deposit. Collaborative consumption is the way to go. People used to do it that way, before we got all huffy about owning our stuff and keeping them locked up, unused in the garage, where our cars can no longer be parked.

Use the marketplace for renting stuff: http://rentalic.com/. They hand out security codes, so you know you're borrowing/lending to the right person.

If you're the more trusting kind, you can try SnapGoods. No security codes there, but it's a more usable website.