Not much, less than $10 for the intial sprayer and glass jar. Then you can buy additional sprayer cartridges seperately. I bought two with the glass jar so you can mix a larger batch of paint and keep spraying when doing a larger area. The key is in the paint and primer. You need to buy decent paint and mix per directions. The Preval lays it down heavy so you need to practice your technique. I found a good single stage like PPG works best. I used 2500 grit and then paint polish to "even" out the orange peel and deepen the shine.