Genze sell their refurbished 1st gen ebikes for under a grand, a cheap way to get torque sensor pedal assist, a spare/replacement battery is $350, and it's assembled in Michigan with domestic shipping and customer service. The Aventon Pace 350 is a grand, has a larger battery, and cadence pedal assist, and is sold in some bike shops. Budget brands Ancheer, Nakto, and Hyper, are sold by Amazon or Walmart sellers and a cheap way to get a suspension fork and disk brakes, recently I saw someone riding the Swagtron EB5 which is $500, echoing the other commenters you might want to read up on other folks experience troubleshooting/repairs with those brands.