Tractor #851 price

The value for "Tractor #851" depends heavily on whether you are referring to the LEGO set or a real tractor part. If you mean the LEGO set, the catalog shows the "LEGO Tractor (851-1) (Expert Builder)" is unpriced in the current view, but the "Tractor #851 — LEGO Technic Set Value (LEGO Technic)" is listed with a used value of $132.13. If you are looking for a real tractor part compatible with a Ford Tractor 851, the catalog shows several options: a Starter is listed at $125.74 new [2], an Alternator Conversion Kit is $164.95 new [3], a Light Switch is $13.29 new [4], a Premium Starter is $106 new [5], another 6V Starter is $106 new [7], and a Water Pump is $64.99 new [6].