I tend to stick to the old "Dollar a gallon" rule unless I can get it for less. New tanks are just so expensive these days that I buy all mine used. I want to get a 125 and those are kind of hard to come buy used at a good price so I may have to pay the price for new, but out of all my tanks (about three dozen from 2 1/2 to 75 gallons, not counting the pool) I may have bought two of them brand new, and one I traded fry for.