A great place all around whether you are looking to donate or buy something. If you are looking for an old door, tile or quirky part for a home project this is the place to go. I recently bought a new vanity and was able to donate the cabinet portion (do check the website for specific requirements on donations). They make it easy as you back your car up to the large warehouse doors and a helpful worker will unload. Don't forget your receipt for tax time! I live 4 blocks away and often go to drop off recycling another great benefit of this place. They have large bins for many different recycling options from card board boxes to plastic.
Also this place is nonprofit and they have an amazing fundraiser every year in September called the Big Pour. $75 ticket gets you all the beer and food you could want for 3 hours. Best event in Pittsburgh!