If you do decide to sell them, I am interested in that gold pan rc10. It brings back warm fuzzy memories of childhood. I can still remember when my neighbor down the street got one when they first came out. 87-88 I believe is correct.
Actually, not to make you feel older, the RC-10 dates back to '85.
I don't remember. Do a search for Mike Dunn or Steve Dunn or Race Prep and you'll find it. If you search Pro Radiant, you'll find a couple info sites mostly dealing with vintage Tamiya that have a page or two of info on these cars.