A Mercedes-Benz SLK 55 AMG averages €37,140 across all model years. Right now 6 are listed for sale, with the cheapest sitting around €24,750 (typically older years) and the priciest around €57,950 (recent years). The median is €33,948. A good price for a Mercedes-Benz SLK 55 AMG is under €32,412; anything over €38,745 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €25,461 to €30,553 for this model, depending on year and condition.