A Audi S1 averages €18,623 across all model years. Right now 15 are listed for sale, with the cheapest sitting around €15,950 (typically older years) and the priciest around €21,950 (recent years). The median is €18,445. A good price for a Audi S1 is under €17,450; anything over €20,225 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €13,834 to €16,600 for this model, depending on year and condition.