papercu, I don't think there's going to be a huge demand for a subsection on WW1 trucks, there are very few left. The ones that do exist are 90 years old, lack any reliable source of parts (you think you have problems getting parts for your 50-yr-old vehicle!), and the few that do exist are pretty much in museums in non-running shape. When these trucks were being surplussed out, the 1920s were in full swing, and the depression was soon behind it. During the early 1940s, a lot of scrap metal was needed for the WWII effort, and most if not all the tired worn-out trucks and vehicles from the 1910s and 1920s ended up in the smelter to make CCKWs and tanks, etc. That's the reason it's so hard to find an original Model T nowadays, most of the Ts out there are only the bucket and frame, the rest has been hot rodded only because the original parts were all busted over time and scrapped out.
I feel we'll see the same for our 1960s and 1970s deuces come around the year 2050-2060. Any that still exist will be deadlined, or in museums.
Wayne
