There is no capital gains tax on vehicles because they are 'wasting chattels' which is why the super rich have been spending crazy amounts on classic cars. It's an alternative economy shifting huge amounts of cash around with no obligation to the tax man. That is possibly the factor that is also driving prices of classic bikes higher despite most people holding back on these kind of purchases in recent years.
I sold a Z1 through eBay a couple if years ago to a guy who wouldn't even talk to me on the phone. He sent his man down to collect it and we got chatting. This guy had a warehouse full of classic bikes and was buying up everything of top quality he could get hold of. His driver was picking up several bikes a week. Big money bikes too. All if which have probably doubled in value already. Tax Free
There's a good BBC documentary called "the super rich and us" which explains it in more depth, also why originality is key because of looming EU regs. Well worth a watch.
