Get one before they go extinct! You can put it on a classic bike limited mileage policy - it'll be dirt cheap to run. Park it anywhere - nobody will nick it. To the kids who do that sort of thing it's the uncoolest machine ever - fork gaiters, twin shocks, they won't be seen dead on it. (To be fair, whenever I saw a reflection of me sitting on it, I thought "what a silly little bike." They are so l-o-w.) But there are tons of used parts around, the motor and gearbox and shaft go on and on and on. You can neglect it dreadfully and it will just keep on passing its MoT, perhaps with the occasional minor weld to the exhaust. And it cuts through London traffic like nothing else. It makes all the commuters on flash sports bikes and big BMs look pretty stoopid.
P.S. I plead guilty to being a loon, m'lud. What do you expect from a courier-turned-racer? I had to give it all up because I couldn't afford to race and I couldn't keep my licence on the road. There are SO MANY cameras. I got fed up with getting a photo of me doing illegal turns in the post. TPTB just don't understand the value of motorbikes any more. We keep the traffic flowing! It's poetry!