I have an 8 gallon hexagon shaped aquarium for sale. It's been in my garage, in it's original box for some time now. It's in great shape, and comes with everything you need to start a tank, except the water & fish (air pump, undergravel filter, gravel, plastic plants, lights). I own a 50 gallon tank now, with huge fish, and am moving next weekend. Just need to get rid of the thing.
Email me if you're interested. I have it listed on Craigslist for $20, but make me an offer.