What! That seems way to high for a 50cc scoot. Heck the dealer sold my like for $1900. 2012 with little over 2000 miles. Look if you can find the blue book on it. Doesn't seem like a good deal. Remember, emotionally the seller thinks it's worth $1500. As the buyer you need to nicely prove him wrong. Tires and brakes, 11000km wouldn't give him more than $800. By the time you factor in the repairs get a new one with a warranty. Good luck.
Ride safe