Gen 1 Trackstar 120 esc run about $43 before shipping (around $50 with shipping) in the USA east warehouse. 80amp is a little cheaper. Keep in mind these esc come not soldered so you would have some soldering to do. Last I checked the hobbywing goes for around 50. I think for around the same price you could also get a speed passion revention s for about the same off of ebay.