These cars are collectable but all depending on condition. I wouldnt use them now and would advise buying something new, maybe a ready to run rc10 B4 which is cheap to run and maintain.
I would advise looking on these sites before selling and asking questions to get an idea on what they are worth
http://www.tamiyaclub.com/showroom_m...80944&id=23061
http://www.rc10talk.com/viewtopic.ph...6940eb5fd2f44d
Also hope some guys from oople give their advice as well. Good luck.