Well, some time has passed but I found out why I got it for $40. The truck got wet and then sat. The AA batteries leaked and caused corrosion in the carrier, power switch is fried and so is the receiver. Servos are still good though. After about 2hrs and $15 dollars (new battery carrier and switch), the electronics are in good order. The old Futaba radio was only 75hrz, so I was already planning to replace it with a spare radio I had. I'll work on the tear-down - clean and rebuild later.

Picked up another RC today at the local hobby shop. The deal looked too good to pass up. Photos and description to follow tonight.