It's all about finding the right buyer, I suppose. In general, C10s are hot now. I believe the short beds are in more demand than long, though. There could be somebody that appreciates the low-ish build numbers of a very basic GMC, but that doesn't go too far when parts have been swapped. There's also the show-street crowd that wants to drop these things and put turbo-LS in, but needing a couple of doors, a fender, some other body-work, etc, their entry-price would need to be low.
In general, those that hang out here tend to view values fairly low, since they've bought and sold many at low prices over the years.
In general, those that hang out here tend to view values fairly low, since they've bought and sold many at low prices over the years.