How much does this cost to the nearest dollar?

airmaxxx Air Over Load Tow Kit Air Compressor, Air Gauge & Tank Fits Silverado 8 Lug Trucks (Black)
Air Assist Tow Load Leveler Kit. Directly Bolts In To Factory Holes Fits 2001 - 2010 Silverado Trucks With 8 Lug Wheels Replaces Factory Bumpstops, Provides Up Of Leveling Capacity Kit Includes Two - Standard 2500lb Air Springs, Mounting Brackets With Hardware, One - AM400 Air Compressor One - 3 Gallon 6 Port Steel Tank One - Air Suspension Gauge & Rocker Switch 1/4 D.O.T. Approved Air Line With Fittings Fits 2001 - 2010 Silverado 3500 & 2500 8 Lug Trucks Up to 5000 pounds of

Price is $599.00
Price: $598.95