A Mercedes-Benz SL 280 averages €26,648 across all model years. Right now 3 are listed for sale, with the cheapest sitting around €22,500 (typically older years) and the priciest around €34,945 (recent years). The median is €22,500. A good price for a Mercedes-Benz SL 280 is under €22,500; anything over €28,722 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €16,875 to €20,250 for this model, depending on year and condition.