Best way to get cheap tanks is to just ask everyone!! I'd say about 90% of people have owned fish at one point in their life and now have empty tanks sitting in their basement. I got a 23, a 20, a 10 and 4.5 gallon tanks for free just by asking around. Only one game with a stand unfortunately, others were lacking heaters, pumps, etc.. but it's still cheaper than buying them new from the store. My best deal though was a fully equipped 30 gallon for $125 that I found through classifieds. Go online though, as papers usually only have 1 or 2 tanks for sale a month.