Brinkley Auctions Oklahoma's largest tractor and farm machinery … Each month, our auctions feature 350-500 tractors of all kinds, ensuring you'll find exactly what you need for any task. Our offerings include robust 4x4 tractors with loaders and a … Each month, our auctions feature 350-500 tractors of all kinds, ensuring you'll find exactly what you need for any task. Our offerings include robust 4x4 tractors with loaders and a …