I have bought all my larger tanks from craigslist or some one I knew, Petsmart usually has a rack of 10 to 40G breeder tanks as plain tanks, this is were I bought my last 10G tank. A few years ago I got lucky and a petstore was closing so I bought a bunch of tanks ranging from 10 to 30G for like 50 for 10 different tanks, I was breeding leapord geckos and working with some other geckos as well at that time, now I have 4 of those tanks set up and the others I gave away before I moved to Texas from CO.