I have run some of your roads in that area, a few years ago. IMHO, personally I would go with the 400 myself. The second one is close to your area, and they seem to have the prices your looking for.
https://swva.craigslist.org/mcy/d/so...619006238.html or
https://swva.craigslist.org/mcd/d/sc...631875183.html
I know NOTHING of either sellers, just a simple CL search. Best of luck in your choice of scooter.