I recently learned about this and I just had to share it with all of you. Habitat for Humanity has what they call ReStores, where you can go and buy deeply discounted home improvement items.
Anything from kitchen cabinets, doors, windows and even primer. Each location's selection varies, of course, and like a thrift store changes routinely. If you are planning a remodel on your house check out one of these stores before heading to Home Depot or Lowe's. Not only are you saving a ton of money but you'll also be saving the item from going into a landfill and you're helping out a wonderful company.