In Europe, there's a market. But not in most of the US, IMO.
You need a niche that is essentially 'scooters for old people.' A small, efficient, 'better than walking' vehicle is hard enough to market...when you've got a cheaper, smaller, less miserable alternative (as I think scooters are)...why bother?
6800 is crazy money.
http://www.yamahamotorsports.com/sport/products/modelhome/150/0/home.aspx
This can be taken on the highway.
This has AC
This can comfortably hold two people...on the highway.
It has 3 wheels, so you dont have to worry about falling over.