New in the box, you might expect as much as $1500 for that buggy. As it sits, it's not very valuable. Parts are all but impossible to get & are very expensive when they can be found - Look for parts on Ebay, they are $50-$60 for a bag that used to sell for less than $5-$10...

Old R/C's are usually only worth a great deal of money when they are new in the box. Still, you never know what someone will pay for something.