Never US-sold, so nearly every B5 RS4 here is grey-market. Federalizing properly (Registered Importer, EPA/DOT/CARB, MPH cluster, US lighting) runs tens of thousands of dollars over many months; importers stress you can't buy the cheapest European car and come out ahead, so a documented, already-federalized car is worth a large premium. …
Import and federalization dominate the B5 RS4 conversation
Audi RS4 (B5) · buying-advice