I picked up this nicely restored little Speedex from 1979.
My father-in-law used one to manage his entire 20 acre property. I was always surprised at how durable and useful it was. I used to joke with him about buying a "real" tractor instead of a lawn mower with tiny tractor tires! I'll use it haul firewood and tote the grandkids around in a wagon. Along with our Farmall Cub, it's the perfect little tractor for the local antique power shows and county fair.
These were manufactured in Ravenna, Ohio and there are several active lawn & garden shows in Ohio featuring Speedex. I'm not sure how popular these are outside of the midwest but they were sold for decades.