Grahames & IBen....it seems to be important that the 'teg you look to buy has been well serviced. Receipts should be shown toshow this. A fine quality oil shoild also be used, I think people prefer 5/30 or 5/40. 'Oilman' on here will sort you out with info in his many posts. If you are buying a fresh import, not much to worry about if it is from a reputable one...follow the recommendations on here. If buying from someone who has owned it for a bit, the same rules aply as with any performance car...make sure it aint been thrashed!
On the interior, the front Recaros can be a pain. Generally, the drivers side outer bolster tends to go due to the natural set up of the seat...I think these are about £20-£30...guides are on here on how to replace. The nature of the material also means that it can go black in patches were a lot of rubbing take place, easily sorted with a bit of warm water and elbow grease.
Expect a little interior rattle here n there, nothing OTT. The japs make great engines, not so much tight interiors like the Germans.
I aint no pro on these cars, there are peeps on here who know a hell of a lot, but have answered this question a million times. There doesn't seem to be a set problem with the cars, just pot luck really. Things are a bit more expensive for them, because of the import factor. I got a lambda just recently at £145'ish.
I dont know what you want really, the same things apply to all cars when buying, there are general bits that you look out for...autotrader does a checklist for this sort of thing.