What immersion circulators are that cheap?

Here's an example, this one is actually $75 currently:

https://www.amazon.com/Nutrichef-Immersion-Circulator-Temperature-Vegetables/dp/B01L7TOZN0/ref=sr_1_18?s=kitchen&ie=UTF8&qid=1486641001&sr=1-18

Quality and customer support may be comparatively unknown, vs the more mainstream brands. But you can get a cooker for pretty cheap, at least.