I've seen these Chinese made, low speed EV Smart Car copies are now available in the US at an affordable price. The basic package looks decent. I think from the info they have 72 volt small AC drives and a very limited controller that keeps them "legal". I can't imagine trying to get around with a car that can only hit 25MPH on flat ground though, as even on 25MPH roads, everyone goes 30 to 35 MPH.
I wondered how hard it would be to add a few more batteries and a Curtis 1238 contoller to make these things into 40-45 MPH cars so they could be driven everywhere except freeways and keep up with the flow of traffic. Do NEV's run special license plates that alert enforcement people of their limited capabilities? Or could you get it registered, and then modify as you choose to?