I was running out of my compressed air duster, so I searched for cheap deals and found this. This is the cheapest deal I've seen for air dusters. It's sold by MyOfficeInnovations via Walmart.com, so this is only online. What's even better, they ship for free, and I'm not sure if this is universal, but I wasn't charged for tax, so it's really just $17.53 for 6 cans of air dusters. Slick!