At Home Depot retail stores, purchase a 1-Gallon Can of Behr Paint, Glidden Paint, Martha Stewart Living Paint, or Zinsser Paint, and get $5 off via a mail-in rebate. Or, buy a 5-Gallon Can of Paint (of the brands listed above) and get $20 off via the same rebate. That's tied with our June mention (which was for Behr paint only) as the best dollar-off discount we've seen on this paint in more than a year. Sales tax is added where applicable. Deal ends September 7.