I had the Big Jim camper too Paul! And my sister also had the Barbie camper. We used to play together and this was about the only time we actually got along with each other. lol
I wish I still had my Big Jim camper. I have no idea what happened to it. Mom probably sold it in a garage sale.
A couple of years ago I cleared out my garage and sold a lot of old toys on e-bay. I sold my Big Jim, Camper and all his clothes and other stuff for $100. My GI Joe and footlocker with uniforms and gear went for $65. I also sold all the Star Wars toys I had, in their original boxes... I had the Milenium Falcon, Luke's Sandcar, Darth Vaders Tie Fighter, Lukes X-wing fighter and all the dolls from the first movie those brought in a little over $200 combined and I had the Original Star Ship Enterprize in it's box with all the dolls we got $97.00 for that. I also sold my Chatty Cathy Doll (she was the first one to talk), my Betsy Wetsy Doll, a Pooh Bear and a Paddington Bear. Even old board games like Concentration, Password, Chutes and Ladders and Stratego were bringing over $10 each.
Our old toys are worth a fortune if they are in good condition and still in their original boxes