Agree with the above re: MX-5, I'm going to get 1 for my g/f and I'll try and find a really cheap 1 at that. Fix her up myself and then hand the keys to the missus, I'll of course take it out for a drive also since I always wanted 1.
I also agree regarding the first gen RX-7 buy 1 now if you want to get a car with a good return like the 240z (not an investment but a car that won't loose value either!).
You also have to keep in mind numbers sold globally don't always reflect local market prices, I can get an MG or a Mini over here (Ireland) at a very good price - say 2-3k - in fact I should start importing them to Australia haha. Also the Volvo P1800 can be obtained for not too much coin.
Anyway I'm going off topic, I think my problem with the 86 is the shape, it's all sorts wrong and it reminds me of a Hyundai which is the ultimate reason I wouldn't buy it.
http://img.netcarshow.com/Hyundai-Tiburon_Coupe_2007_1600x1200_wallpaper_09.jpg