A Audi S1 averages €19,269 across all model years. Right now 5 are listed for sale, with the cheapest sitting around €15,950 (typically older years) and the priciest around €20,995 (recent years). The median is €20,500. A good price for a Audi S1 is under €17,950; anything over €20,950 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €15,375 to €18,450 for this model, depending on year and condition.