Welcome to the Stovebolt!
What's it worth questions are always hard, because the only real answer is what is the most a capable buyer will offer for it.
It sounds like something I'd like to have, and since I'm also in Washington it might be close enough I'd be will to travel to get it. But in today's economy I would hesitate to make any offer for fear you'd accept and I'd have to let go of some cash.
If it were me I'd assess the cost of putting it back together and think about how fast I'd need to turn it into cash. Its going to be hard to sell it high today, and while you may not get much return on investment putting it back on the road, you will have the fun and satisfaction plus things might be much better in a few years and then you'll find better cash offers.
Just my two cents.
