Stan, I've got a perfect one for you. It's a 40g breeder that was used only once with freshwater to display the new (at the time) Vortech MP60wES at last falls MR frag swap.
The tank has a small defect though. The top bracing was near a heater (not a tank heater, a home heater) and the brace warped a bit. Only cosmetic, not structural. Put that part of the sump facing away from you and you'd never know it was warped.
Shoot me a PM for a price on this steal of a tank.