Has anyone heard of freecycle.org? Its esentially a recycling site for useful stuff. Long story short though I posted an ad for a bigger tank a while back and within a couple days I had two people offring me new enclosures (well new/used). A 75 gal and a 55 gal, picked up the 55 gal and I have to say after a little cleaning they were good as new, at no cost other than picking it up. Any way try your luck sometime you never know what you will end up with.
www.freecycle.org :D