A Triumph Speed Triple 955i averages €3,100 across all model years. Right now 2 are listed for sale, with the cheapest sitting around €2,500 (typically older years) and the priciest around €3,699 (recent years). The median is €3,100. A good price for a Triumph Speed Triple 955i is under €2,800; anything over €3,399 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €2,325 to €2,790 for this model, depending on year and condition.