More than once, I've eyed off the IKEA Gestalta artists' dummy and then decided not to buy it as it'll just be one more piece of clutter. Blogger John came up with a good excuse for purchasing it though: he turned it into a lamp.
As well as offering an excuse (of sorts) for buying something that looks cool and only costs $5.95 but is ultimately pointless, adding the lighting elements might appeal to your inner surgeon. Rigged up your own cool lighting system from unexpected items? Share it in the comments.