Peter,
I think that the price movement has already been noticed, but I think that the trend was set already from 2000 and after, then the crisis pushed the supply up, therefore prices went down. However, there is the market for top quality (even concourse) vintage cars, where there prices never went really down and the others, like most of our pagodas we own, which are slowly and meticulously renovated, bout without being too fancy about that. It's that segment the article was referring to, I guess.
Another explanation for the article is that this was a sponsored text by car dealers or even part suppliers to stimulate some extra interest and justify their moving prices up.
In can see some similarities between vintage car market and small aircraft market (especially small corporate jets). When the market for new shrunk and went nearly dec for second hand, you could see tons of articles presenting endless merits of private aviation, attempts to prove that although the cost more than average plane ticket, actually you save money… as time is money etc etc.
Both markets require enthusiasts that don't look too much into expenses and don't see the financial black hole. with all due respect, if we were to listen to our accountant arguments, quite frankly, we would all drive bicycles and use mass transport only
So let's not be too afraid: yes, fewer people will be able to enjoy them, as the become scarce anyway, but were our Pagoda ever democratic, popular cars?