I had a friend look up importing skylines cause he wanted one.
You can get a r32 GTR for under 20 grand. NO motor-x
http://www.nhtsa.dot.gov/cars/....html
^ thats the list of companies(RI) that can import it for you. you pay them to pay wherever in japan for the used car and for them to ship it. call them all up and you'll find one to do it. ( notice motorex is on the list)
Then. you look on the governments site for where to get all the paperwork.
Motor-x did all the crash tests required for vehicles by the DOT and because of that the DOT has all the information on file. They should also be able to tell you what you need to change out to make it emmisions legal.
Because of motor-x you dont need motor-x to get a used skyline. they did all the hard work for you.