Good question. He's had it for sale locally here for months on CL. I think the last time he had a price tag on it he had low $20,000 range. Not sure it will get that, as it never sold. But now he's got it listed here with no price tag. His ad also used to say he builds gassers and would build one for anyone who wanted one. http://corvallis.craigslist.org/cto/5345537976.html
If I was guessing on a value, I'd put it in the mid teens, as it looks great, and appears to have good stuff in it. But it needs to have the interior finished to get over $20k, and what he's got in the interior wont get near that range.
In your photos it shows the lack of carrying the paint down under the rocker panels... the bottom pans could use some attention, so your right its not worth what he was asking for it... kind of makes you wonder whats under the paint