RVParkStore.com has 1 RVs for Sale in Washington County, CO. Find the perfect RV, camper, or motorhome in Washington County, CO. The current average listing price is around $39,900. RV prices in Washington County, CO have increased approximately 11% compared to the 12-month average price of $35,950. Listing prices currently range from about $39,900 to $39,900 depending on the size, age, and mileage of the vehicle.