I live in a pretty remote area in Orange County, California, very close to the Holy Jim trail and there are 4 square body K5s on my street, one of course being mine. Oddly, there were none on the street before I moved in a year ago. I like to think my full vert motivated a few neighbors to save a few squares. It seems that square bodies are certainly gaining popularity among guys my age and prices for certain models have gone from affordable to ridiculous. I have been seeing more and more nicely restored and modded examples pop up at local car shows and cars and coffee too.
I have been buying junk cars for years, to restore them and sell them after a summer of enjoyment... well that changed with my Jimmy. It has been 3 years since i finished most of the restoration and will never part with it. I have wanted one since I was a kid and now that I have one will keep it forever. In fact, I probably drive it more than any of my 3 other cars.
But to counter what some guys are saying about new trucks not being as good or whatever, I disagree sort of. I can't speak for modern day Chevy trucks as I have never owned one and would probably never buy one, but I do also have a Toyota FJ Cruiser, easily the most reliable and capable 4WD I've ever owned. It's lifted now with BFG T/A ko2 tires, but even before the lift and tires, in stock form on stock tires it would do everything the Jimmy could do and then some... and on a few occasions have put new trucks to shame in the mud. Nothing is more gratifying than pulling a lifted new 4WD truck out of the mud with a bone stock FJ on bald tires. I wheel it pretty hard and with 73,000 miles on the clock I haven't had to fix or replace squat on it. Oh and maybe my favorite part... no leaks! Still feels and looks like brand new. Sure, it's not made of steal as thick as a squarebody, but it's still very tough, lighter, faster, more comfortable, more efficient, has a more rigid frame and it's got an awesome 4WD system. As for plastic bumpers they make tough steel aftermarkets...