The C6 RS6 was never US-market, and 2008 cars don't reach 25-year import eligibility until ~2033 — so legally importing one to the States now is extremely difficult. Most cars in this market are Canadian, and the running joke is the inevitable 'can I import this?' question. …
Grey-market: never US-sold, not yet 25 — importing is hard
Audi RS6 (C6) · buying-advice