Which one, the Chugger or the cheap one?
If you're asking about the cheap one, I got one about 3 years ago off ebay. Back then they were not marketed for brewing, and were a bit cheaper, I think about $40. Mine is still working, it's not very powerful, but works for me. You have to buy a "wall wart" AC adapter if you are going to use it on house voltage, because it's made for solar hot water systems DC voltage.