Parts for the kit should be easy to come by if a local hobby store carries Losi products. The car has been revived as their drift car
As was stated already, if you dont have personal knowledge of the condition of the batteries that could be an added expense in the short term, but would definetly be something that I would ask about. Possibly the motor as well. If it has been run hot then the rotor could be suspect. The ufortunate part is if you dont have the tools or knowledge to look at either you wouldnt be able to tell good from bad.
As for performance, the car has been very successfuly at local parking lot tracks in my area with a range of drving skills. The biggest problem I have seen for the car is the neccesity for using the losi spur gears, this can be a limiting factor as you try to figure out what others are running for gears. You may want to pick up this spur adapter
if you are considering running 17.5 or lower brushless motor setup, or as tuning aid. It may be hard to get into the running range that the 17.5 and 21.5 motors require for your particualr situation useing the stock or aftermarket losi gears.
I would ask him or her to show you that it all works before you commit to the purchase. Would hate to see you back here frustrated becasue you purcahsed it and cant figure out how these things go together.
Hope you enjoy your purchase should you decide to do it.