gkmizuno, 
There aren't a lot of #electricbikes out there that are UL-listed, folding, with an internal 7-speed (Shimano) hub, and cheap -- like $559.
This is crazy cheap. And there's no markup if you want fat tires.
Still, I'm going to wait for Oregon to pass a bill that establishes an e-bike rebate program.
https://gotrax.com/products/f1-electric-bike?variant=41100878282867