Another hint for craigslist, besides searching for 'aquarium' I also do a search for 'fish tank'. Every once in a while you'll get one labeled fish tank that you might not have seen otherwise - thats the way the one I bought was. Around here it seems like everyone has an over inflated idea of how much tanks are worth. I'll often see 55g setups for well over $200 (and nothing special about them either).