You are much better off buying a used Novak, which you can find in these boards for relatively cheap. I bought my GT7, that was basically brand new for $75. I did buy it from the brother of a guy I've raced with before, but he, along with everyone else on this board, is stand up, and will not try and rob you. There is so much on the line when you run a cheap ESC, and if it blows up, you will likely be replacing more than the ESC. The best way I can describe it is- you are paying for reliability, not performance. Think it over. Cheaper is (generally) never better in this hobby.