Price and value of articles are often remote from each other. For what you will pay for a good Commando, you can probably buy an excellent modern Ducati. In the end it all comes down to values. I still own the Seeley 850 I built in 1978. I value it more than any Ducati. My advice to any young guy is, if you own an old bike - never sell it unless it is a complete piece of garbage. Just make room for it in your garage and cover it up to stop it from rotting. Some people buy Harley Davidsons for only one reason - they are completely rebuildable. Old British bikes are the same. They are not throw-away items.