if you lucky enought to find one cheap odds are its glass, and then you have to worry about weight, they are extreamly heavy! no joking around extreamly heavy! mine i got off craigslist cost me about 600bucks with the filters and it was acrylic and was killer to move (2 guys) just keep that in mind my recommendation fork out the extra money and get an acrylic it will save your backs and cuz if you buy one and for some reason it (glass tank) drops during transportation from the truck to its new setting, your out of some money and one hell of a clean up ahead of you! best of luck with your search but seriously look till you find an acrylic! -Dan