I bought an ecotric fat tire folding bike for $779 earlier this year on amazon. I have no complaints, It's a nice bike, but I should have bought a regular 20" folder, because fat tires are kind of silly on pavement.
Here's their current sale on a city bike. Disk brakes. Bafang motor. 36V battery will give 25 mile range. The three speed pedal assist is acceptable. It's the same control as on the Natco and a million other ebikes. In fact I have it on the above and also on my first ebike kit. There's a facebook owners group and there doesn't seem to be much angst there.
https://www.ecotric.com/collections/...Fd8RiyHACaViaE