I have several of these I will be willing to sell. Just underpowered for my tanks.
I currently have them set up with no temperature controller so basically to control the temp. you unplug and plug back in. The do make temperature controllers for this unit.
I am selling these for $100. They are $150 new and the plug end I got it $10.
Also, I don't directly sell dyes anymore but being in Miami you have alert sales and allied plating. Caswell resells U.S. Speciality products.