RVParkStore.com has 1 RVs for Sale in King County, AZ. Find the perfect RV, camper, or motorhome in King County, AZ. The current average listing price is around $26,750. RV prices in King County, AZ have remained unchanged at approximately 0% compared to the 12-month average price of $26,750. Listing prices currently range from about $26,750 to $26,750 depending on the size, age, and mileage of the vehicle.