A few examples of appraisal values for
BING TRACTION ENGINE

• Rare Bing Live Steam Traction Engine
  Rare Bing Live Steam Traction Engine w/Accessory Description Bing traction engine set up to operate a grinder. Mounted on a wood board, this engine is ready to do its work. It has a whistle, safety valve, and part of its original fly ball governor.Condition (Excellent). Size 10 - 1/2" x 7 - 1/4".
• Bing Traction Engine (Fahrbare Dampf
  Bing Traction Engine (Fahrbare Dampf Lokomobilen)
  Description This is the early variation with the short firebox. It includes whistle that appears to be a Weeden whistle, a stationary cylinder, and a Bing name plate on the side of the firebox.
  Condition (Very Good). Size 7 - 1/2" x 6 - 3/4".
  
• Bing Traction Engine With Brass Boiler.
  Bing Traction Engine With Brass Boiler. Description This is an early variation without the extended firebox flame guard. Circa 1910. The smoke stack is replaced. The boiler has been polished.Condition (Good - Very Good). Size 9 - 1/2" x 8 - 1/2".