a few years ago my friends dad asked me if i could get parts for a circa 1920 mechanical pallet jack
other than being an interesting piece it wasnt worth fixing (maybe it was who knows lol)
i dont think these old trucks have much value except to the OEM who may want them for nostalgia
or as part of a period piece for some sort of display

i put a 1940s lt30 to rest about 2 years ago lol
you sat beside the motor
the clutch job wasnt worth it to the customer lol