I think we're all agreed that anything in decent order that is 20 years old will hold its value and probably appreciate. This is due to the relative scarcity of such examples I would think.
Also something that has shed 90% of its value already probably won't move much more. Take for example a MY2000 Mercedes. With plenty of miles on it you can pick one up for £5K. It'll be worth that still in a few years provided you maintain it well. This 2004 city rover mentioned above is also an example of this.
Trying to think of something 10 years old or less, that is worth more than 10% of its new price and that won't depreciate much is a more difficult task.
I think the CSL is a given. 996 is also a good shout. I also wonder whether my Z4M has that much further to go over the next few years. Examples going for £15K now and the previous generation Z3M is not that far below despite being at least 5 years older in most cases.
Also something that has shed 90% of its value already probably won't move much more. Take for example a MY2000 Mercedes. With plenty of miles on it you can pick one up for £5K. It'll be worth that still in a few years provided you maintain it well. This 2004 city rover mentioned above is also an example of this.
Trying to think of something 10 years old or less, that is worth more than 10% of its new price and that won't depreciate much is a more difficult task.
I think the CSL is a given. 996 is also a good shout. I also wonder whether my Z4M has that much further to go over the next few years. Examples going for £15K now and the previous generation Z3M is not that far below despite being at least 5 years older in most cases.