RVParkStore.com has 1 RVs for Sale in Marion County, CO. Find the perfect RV, camper, or motorhome in Marion County, CO. The current average listing price is around $209,000. RV prices in Marion County, CO have remained unchanged at approximately 0% compared to the 12-month average price of $209,000. Listing prices currently range from about $209,000 to $209,000 depending on the size, age, and mileage of the vehicle.