How much can I get for a 69' Lincoln Continental?

I'm attempting to sell my brother's 69' Lincoln Continental, but I can't even begin to figure out how much to ask for. I don't want to over price it, especially because of it's condition. I think that's my biggest challenge; it was beautiful when he got it. Now? Now it has some rust, I think it's the topcoat on the car that is peeling off, it doesn't start and the driver side door won't open. Any ballpark ideas? I know absolutely nothing about cars, and just need to get rid of it.