I'd start out at 50 bucks if it's been sitting there for years.
It's going to cost you a few bucks to get it home.
Hopefully you would have the room and an understanding spouse if you elected to save it.

Wow, the tires still hold air after a few years? Makes me think that someone cares about this Amazon.

Unfortunately, unless you could do all the work yourself, I could see that turn into a money pit if it's terribly rusted and you wanted to turn it into a driver. Parts could be worth something though provided someone is interested. Sometimes that doesn't always pan out though.