A Opel Signum averages €3,181 across all model years. Right now 9 are listed for sale, with the cheapest sitting around €1,300 (typically older years) and the priciest around €8,750 (recent years). The median is €2,300. A good price for a Opel Signum is under €1,995; anything over €3,595 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €1,725 to €2,070 for this model, depending on year and condition.