A Ducati Monster 821 averages €7,571 across all model years. Right now 9 are listed for sale, with the cheapest sitting around €6,000 (typically older years) and the priciest around €9,450 (recent years). The median is €7,495. A good price for a Ducati Monster 821 is under €6,900; anything over €8,450 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €5,621 to €6,746 for this model, depending on year and condition.