Try a Porsche Boxster if you really want to see what depreciation is all about !
I looked at a new plus 4, a new Boxter, a three year old Boxter and three year old MX5 and a new MX5 all with a loss of Interest of 3% pa.
The only car that would compare with the Morgan re lost of capital and interest over 6 years or so was a three year old MX5 as they lose more than 50% of their value if you get someone who needs to get rid of it and is not trading it in for a new MX5 via Mazda.
As I have said buy one if you want one but Mike if you are so sure about them making money why do you not buy three of them and make three times as much.