What's funny is just how undervalued some Korean Car Robots stuff is.
While it's not Car Robots perse, I picked up a boxed, complete AutoJetter - one of the new Autoroller moulds from Beast Wars Second - for $20.
Also, I have reviewed JRX here. I would recommend JRX - Japanese or Korean - over Rail Racer, autobreadticon, since Hasbro made some dumb changes to the missiles which prevent them stowing properly in the train modes. That's a decent price, too!