[Stocker]

I think you summed up the reason with your statement about 2WD trucks. Sporty vs utility. I think a short 4x4 is seen as more of a plaything (even though it is capable of earning its keep) and a LWB 4x4 is viewed more as a work truck (even though you can play around in it). Maybe more people put a premium on fun when it comes to these old trucks. Just a guess.