It prolly is state specific, but I'm pretty sure they'd be illeagle most everywhere. They're too small to really be able to see while driving on the road. For the same price you could prolly find an old beat up scooter and get it leagel if you were patient enough.

Thos things are fun, but not meant for street driving. They're meant to ride around your property (driveways, lawn etc...), but not down the highway.