I only ever seem to notice nice examples of these becoming ever more expensive. I'm not just talking recently, but it always seems to have been the case??
You could pick up a nice one (the coupe, that is) for £12k well within my memory. A couple of years ago I saw an absolute dog at the French associate of a famous British RR specialist family firm, for which the price tag was 50k€.
Prices for good cars seem to be firm but they can take a while to sell. Rarely find the Convertibles below GBP 30,000, but still see the Saloons advertised from around GBP 12,000 - although suspect you need to pay more for a nice example.