I just picked up one at petsmart down from 43 to 36 with a petsmart card. The heater is one of the only things i never buy used. Could be a catastrophe if it overheats and I've had them go bad on me. Although sometimes you will see people letting them go almost new
The thing w heaters is I don't trust the internal thermostats!! Best to run a heater on a controller (apex rke) will cover your azz if things go wrong! I also run heating elements which is that much wattage when u plug in so hence the reason for controller!