In my area I see there is a local ad with someone selling a used 125 tank that comes with 2 HOB's (think they are the Tetra's), a heater, gravel, and a mismatched top and light set. Says make offer and am debating whether to do make an off or not. How much you think would be a good price for this setup? Any suggestions would be appreciated. Really have no idea what used tanks are worth at all.