With tongue a little in cheek and also playing devil's advocate, should we not be encouraging any move by dealers towards pricing these cars higher and thereby starting the process of the market putting increased value on them? We are always talking about how these cars are undervalued/underrated compared to equivalent Italian exotica. Plus there is the suggested potential centenary effect that many have been talking about. Perhaps we should be more supportive of this move to push the value of the cars up. Of course, it means we may be disadvantaged in the short term as buyers, and dealers get to make a bit more profit, but hopefully in the long term the value of our existing vehicles benefit.
I experienced this in my years of Lotus Esprit ownership. The cars were viewed as hugely undervalued, particularly the early Giugiaro cars. But the prices of good Giugiaro cars has steadily strengthened to the point where good S1s that could be had for under £10k les than 10 years ago are now fetching north of £30k. Values of good V8 cars have also strengthened. This process was started by specialist dealers who recognised the scarcity and growing appeal of good cars, and then this worked its way into the wider market. There was plenty of scepticism about this at the time amongst the Lotus community.
Just an alternative perspective, particularly since it is not just one car that is being advertised at increased prices, but many "good" cars.