Browse Mack MD6 Sewer / Septic Trucks for sale on MyLittleSalesman.com. Compare prices, photos, and seller details across 5 listings. Mack MD6 Sewer / Septic Truck pricing ranges from $159,077 to $159,077 based on recent marketplace data. Filter by GVWR, number of axles, transmission, mileage, and more to find the right Mack MD6 Sewer / Septic Truck.