RVParkStore.com has 1 RVs for Sale in Harmon County, OK. Find the perfect RV, camper, or motorhome in Harmon County, OK. The current average listing price is around $22,900. RV prices in Harmon County, OK have remained unchanged at approximately 0% compared to the 12-month average price of $22,900. Listing prices currently range from about $22,900 to $22,900 depending on the size, age, and mileage of the vehicle.