600.00 is a very fair price for a 2013.
The rust is a non issue. It actually is a good thing in a way. It is showing you the engine is not spewing oil thru the cylinder.
Keep in mind... These are just one small step up from the cheap China scoots flooding the American market. They are slightly better quality from the tires up thru the twist grip, but they are still not the best.
I have had my 50cc kymco for 6ish years... I copied this from this thread:
http://www.kymcoforum.com/index.php?topic=10099.0Quote Zombie:
"The only way to qualify this is to say I bought mine ('05 ZX-50) w/ 23,000km in 2008. It has gone thru four different incarnations. The dealer installed a primary gear set/Malossi variator/Contra spring/19mm delorto carb, when the bike was brand new.
I installed a malossi sport cylinder, Technigas RS II pipe, delorto 28mm carb and de restricted CDI. That lasted 3 years, and 20k miles of daily driving
Next life was a 50mm Jiang wayne cylinder, and engine case porting, w/ a 24mm OKO flat slide carb, and Jiangwayne expansion pipe. another 6k miles in a year.
As it is now... Everything has been changed to make it a mile speed bike, and it easily reached 82MPH without being fully tunned. I only have 32 miles on it since that build.
Point is the bike has gone thru hell, and looks/runs better than the day it was assembled in Taiwan. Still on the original engine cases, and rolling chassis.
I don't really believe this bike will ever be done. I have passed up several purchase offers because I will not sell it to anyone that does not realize what it is, and what it takes to keep it running. 20 years from now I hope my grand kid can show it off to his kids."
