A Mercedes-Benz SLK averages €16,440 across all model years. Right now 5 are listed for sale, with the cheapest sitting around €14,400 (typically older years) and the priciest around €18,250 (recent years). The median is €15,900. A good price for a Mercedes-Benz SLK is under €15,700; anything over €17,950 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €11,925 to €14,310 for this model, depending on year and condition.