Buy it from a jap auction!!!
You'll save a third (including shipping, SVA test, import tax and VAT!)
They have stringent government controlled laws covering the sale of second hand cars so they are all honestly graded 5 to 1, they use other grades with letters but they would be dubious; IE Q plater over here!
5 is the best, and to be honest in Japan 1 isn't that shabby either!!!
Don't worry about it being an import cause all GTR's are anyway!!
Have you ever seen a British Jap car importer without a smile on his face!
He can turn £28000 into £50000 for a good R34 GTR V Spec!