How Much is a 1970 Triumph Bonneville Worth at Auction?

The 1970 Triumph Bonneville represents a specific production year with 6 documented auction sales in the past 12 months. This year commands a premium of 36% above the overall model median, reflecting its position within the model's production timeline. The median sale price of $9,750 places it above the broader Triumph Bonneville market average of $7,150. Values for this year range from $5,500 to $18,000, demonstrating substantial variation based on condition, mileage, and specific configuration.