today. The cast iron models are considered the most desirable antiques since many originals were gathered up in war scrap iron drives and destroyed. Hog oiler collectors come from all locations and ages, some as young as 11 years old. Generally the "hog belt" of the upper midwest provides the majority of hog oiler finds today—states such as Iowa, Illinois, Indiana, Nebraska and parts of Kansas and Missouri. Prices paid by collectors can vary widely, based on size, functions, and condition of the machine. Smaller hog oilers can be purchased for sometimes thirty dollars or less, while the rarest models can have asking prices in the many thousands of dollars. A small cast iron "wheel" type hog oiler that appeared nearly unused was featured on the History Channel program Pawn Stars on August 8, 2011. It sold for $100. References External links Patent issued to E.J. Smith in 1913 for a twin wheel hog oiler. Patent issued to F.R. McDermond in 1916 for a "watermelon type" hog oiler. Patent issued to Albert A. Nasser in 1918 for an overhead tank reservoir hog oiler.\ Patent issued to William J. Marsh of Dexter, Iowa in 1918 for a Dexter Hog Oiler. Pigs Agricultural machinery