If you can do basic mechanic work a Chinese bike is an exceptional deal. You will need to remove all the body panels to inspect, fix assembly problems, replace the Chinese CVT belt with a Gates Kevlar CVT belt and replace all rubber hoses. I have a TANK 250cc urban touring with 19,908 miles on it with no problems. It will run 70 mph on the interstate. Fuel usage is only slightly more than a 150cc and the 250cc bikes feature liquid cooling and a higher quality engine. Parts are no problem.
http://www.scootersgeorgia.com/
http://www.partsforscooters.com/
First years mileage.