Was a long time ago ,10 years this coming Christmas that I bought it,only reason I sold was my partner at time hated people looking at her when driving lol We split up 7 1/2 years ago. Value of mine would have doubled by now too!
I cant say I've noticed that. Since looking a couple of years ago, as far as I've noticed they have slowly depreciated at around the same rate.
I notice that the V10 R8's seem to be holding their value a bit more though.