I called one of my friends, who is the manager of one of my local pet shops, and asked him about the Repti-Temp Rheostats. He said they retail for about $28.00. If you are going to spend that much on a rheostat, I would suggest looking at the Repti-temp 500r or the Hydrofarm thermostats. They are roughly the same price, maybe $5-$6 more. I'll see if I can find some links for you...