Mel, I would gather as much info as you can from Bruce's prior posts. Take written notes of things that Bruce posted regarding options, upgrades, etc. Maybe concentrate on just 1 of the cars to sell first, so you get a feel for trying to sell a car. If you can take lots of pics, I'm sure the members here can help you to determine fair market value.
I would be patient and get in touch with waggin before you do anything. He probably has the most knowledge of what was done to the cars, especially the wagon.
I'm sure you are under alot of stress due to Bruce's passing (RIP), but being in a hurry is not in your best interest in my humble opinion.
I'd be happy to help you with the posting of pics or working up an ad, if needed. You should have my email addy.......Take Care C