Why we're they illegal to own? Didn't know they we're.
Federal law...due to emissions and safety regulations. Once the vehicle is 25 years old (by production month/year) the feds no longer care. The vehicle importation buisness is very very sketchy...you have to go with a legit importer and make sure you have all your paper work (bond release, NHTSA, etc etc) is legit and not forged because that shit has happened too. A lot of people think just because a car has a title and is registered in a particular state that you are good to go.... WRONG. Feds can seize the vehicle at a moments notice, you either have to ship it back out of the country or it gets crushed. Anyone selling r34s, s15 and such claiming they are legal is full of SHIT. Some r33s are because they were motorex cars which was a company who bought skylines to wreck / crash test in order to become usa compliant with NHTSA/fed laws guidelines... Those cars will sell for upwards of a 100k currently in some situations.
As of now though, you can import r32s and s13 Silvias as long as they are 25 years old. Probably only good thing about being in NY is we have ports and nostalgic imports is right in the city about an hour from me and they are a reliable trust worthy importer. So when the time comes I'll be using them to get something nice. I almost bought and s13 last year but then found my Chevelle and the Chevelle was actually cheaper then the s13 so I went with that. Now that they hype is over because it's into the second year the cars are a lot more reasonable in price compared to last year