How do you find out how much to sell an antique pop-up for?

In my opinion, older pop-up campers do not hold the same value and appeal as say an antique car does. Finding a buyer is gonna be hard. I see pop-ups listed on craigslist in my area for 500-1000 that are in decent shape and need no work.. that don't sell to quickly. I'm sorry but I just don't see a market in restoring a pop-up.

Personally, I would list it on ebay with a reserve of what you are will to sell it for and see what happens. You never know what might happen.