my bro and i went through a similar situation with a property that had been in the family for 130+ years and to which we had tremendous emotional attachment and sense of obligation (to keep it). it took us about 18 months to agree to sell it - our reasons: not enough use and too much money to keep it up given that lack of use.
we originally placed the house on the MLS at a particular price and then found out quickly that we were kidding ourselves given the market. i know real estate is different from car-buying, but the property, like your truck, is very unique. after a few months, we decided that it was either drop the price or look at other options (we did check out renting it, but that was a joke).
our agents employed an ebay-like bidding model. the first few bids were major low-ballers, but as the price rose, those with serious interest got in on it. after the two-week bidding time frame expired, we had two reasonable offers. we were able to play one off the other a bit and were able to increase the sales price slightly. the family who purchased were simply tailor-made for the property.
i may be going overboard here, but i think one gets the picture. the biggest thing is to decide whether it's worth more to you to keep the truck or sell it. if you decide to sell, you must put your emotions aside (obvious, but easier said than done) and come up with the lowest reasonable number you think you can stomach. in the end, you will find the right buyer, and you will know this when it happens. they will be ecstatic about a very unique vehicle and the money you make from the sale will (1) not keep you up that night kicking yourself and (2) will finance the next rover chapter in your life.
i, for one, have ogled the truck since before you decided to sell, but it simply doesn't suit my needs (right now, anyway). listen to the other guys - have patience, faith and check your emotions at the door.
good luck!