It would be interesting to know just what the ceiling prices are for Trads. and 3 Wheelers? However much people like Morgans, there is bound to be a price at which they don't consider them to be any kind of value.
Given that the cost of a car is the amount lost in depreciation, not the initial cost of it, and dealers' retail prices on s/h cars are all very high, then perhaps many thinking about a new car will convince themselves that they won't lose much, if any money in depreciation or as it's called now, residuals,at sale time, however they tend to forget that a dealers price is nowhere near a trade in or buy in price, and my guess is that a dealer will put about £5000 or more onto a car when it gets retailed.
When I was selling my first Three Wheeler after 1 year and with 3000 miles on the clock, I advertised it for £25k and ended up selling for around £22k after quite a while. This when the price new was around £32k plus and when Three Wheelers were very rare too. The best offer from a dealer was £20k! They were all advertising similar cars for around £28k - £32 depending on spec.
It's easy to see why someone could get seduced into the man maths and decide there is still very little depreciation on a Morgan. Admittedly though, not as bad as most cars, which will lose half their value in 3 years, unless they are French of course, in which case they lose most of their value in 3 years.