Ebay foldable electric scooters from China

[TheWhopper]

Does anyone have any experience with electric scooters sold on Ebay? Was it a good purchase? Looking for input..

Here are two I'm currently looking at:
http://www.ebay.com/itm/Foldable-Smart-Electric-Motor-Scooter-Bike-350w-35km-h-25-35km-Mileage-/222069438278?hash=item33b45eb746:gvQAAOSwgApW-5yK
http://www.ebay.com/itm/X7Smart-Electric-Scooter-Kick-E-Scooter-Rechargable-Foldable-20KM-h-300W-EU-Plug/291624572786?_trksid=p999999.c100623.m-1&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20160323102634%26meid%3Dd23ac6129c9345f5a4a2d0aed8368288%26pid%3D100623%26rk%3D3%26rkt%3D6%26sd%3D222069438278

These are the features I'm most interested in:
- electric
- pneumatic tires / shock absorption
- foldable
- customizable
- weighs under 50 lbs

Goals:
Swap out to a larger motor later on
Swap out to a larger battery later on

Thanks!