This is very interesting, just on this one page there are 5 Cyclemotors, there are 3 Cyclemasters (assume the black 25cc ones for 1949) and 2 Trojan mini-motors. This just goes to show in these rationed times how important personal transport was and by motorising your bicycle you could achieve 150+mpg on your quota. I think they were great, just think, in a Cyclemaster back wheel you have an engine, clutch, petrol tank, lighting coils, what a clever design of packaging. I believe originally designed by Siemens and built in the UK.
As Marcus says, in real terms motoring today is cheap and has been for a long time, just look at the amount of traffic on our roads, that says it all.
My first car was a Bond Minicar purchased in 1969 and I still have it!