RVParkStore.com has 1 RVs for Sale in San Diego County, WA. Find the perfect RV, camper, or motorhome in San Diego County, WA. The current average listing price is around $16,500. RV prices in San Diego County, WA have remained unchanged at approximately 0% compared to the 12-month average price of $16,500. Listing prices currently range from about $16,500 to $16,500 depending on the size, age, and mileage of the vehicle.