I got an older model 150, i think it says 105 on it. The price was right, the guy was trying to sell it but it wouldn't heat up so he gave it to me.
Knowing it was a Cookshack, I took a chance and replaced the heater coil. It has been going strong for the last three years.
Mine is so old, it has a small black knob on the top - no temps or marks at all. It's like a rheostat that adjusts the temp.
It works great and I expect will be around after I'm gone.