Hi Racingt. I had similar thought to you 18 months ago. My first choice was a CB72 because of the excellent design. Expensive, spares becoming difficult and expensive to find. A decent restored example would be about £8000 but then you are scared to ride it. Second choice, a CD175 Sloper (the bike of my teenage years). Same problems as the CB72 but worse. Third choice was a CB250 K1 or K2. I found a K3 in reasonable condition with most of the expensive work done. I enjoy it but you have to expect to do things. In my case, professional help to sort the carbs, sorting a few minor electrical problems and now sorting the clutch. The more you look, the more you find interesting repairs of former owners. The worst was the wiring from the right handlebar switch. Solution was to strip it all out and rewire from scratch with the correct colour wires etc. I am still looking forward to the spring.