No worries, you should have a good chance of finding Eurolines on the driftworks private sale section.
and my RX-7 is 1989 FC, I got it cheap (very cheap compared to prices nowdays) when I was 19 (i'm now 32) and due to moving abroad for work sadly it ended up sat in the garage for several years. thankfully the original rotary engine is still going strong, only 64k miles, I need to get it back on the road and start using it again but the bodywork needs sorting!
if you can find a good turbo model on Japanese auction sites for a cheap price then go for it, but like you said they've gone up in price a lot! I haven't seen a cheap one for a very long time unless it's falling to pieces due to rust!
you can also get away with cheaper road tax if you get an import model, kind of a loop hole (DVLA correctly classes the import as the 1.3 rotary engine, it's equivalent to a 2.4 piston engine and non import UK models get put into the 2.4 tax class!).