Hate to see it go but I submitted your ad to
Bring-A-Trailer. They used to be a great site that featured interesting classifieds around the country. Now it's mostly 911 and M3 auction site with a bunch of whiney commenters. Nonetheless it might be worth looking into their auctions because your van is right up their alley. You need an enthusiast who will read your build thread and see the solid work put in and has no issue dropping the cash. I personally think it's worth more but an auction with a reserve is a good way to see what the market says.
Good luck.
Gregor
PS You need more photos of the pop top opened up including some from inside.