Can't believe it's 5 pages in and there's no mention of the RX7 Spirit R.
It's got all the hallmarks of a classic:
Last run of model
Questionable reliability (assuming you believe everything you read online)
Appreciating in price (£20k+ for a Spirit R, whereas a standard one can be had for about £5k)
Very few, if any, on the UK roads
Arguably the most beautiful car Japan has ever produced
It's a magical car that Mazda appear to have fluked their way into making as good as it is.
This is all assuming it's not already considered a classic, but seeing as mk1 MR2/MX5 it's being mentioned, I'm not sure.