Restore

Habitat for Humanity Restores are great places.  If you have never been to one you need to drop by.  Here is their website with store locations: 
http://www.habitathuronia.com/restore.php

You should talk to them if you are planning a renovation.  There will be many items that you may think have to go the the landfill (at your expense) that they will take to be re-sold.  You may even be able to get a tax receipts for some items.  Here is some information about them from their website:

"The ReStore is a retail outlet that sells recycled and new building materials, hardware, and appliances to the public at bargain prices. New material has been donated by our business partners. Profits from sales are used to build more homes for low income family partners."