Don't know if I mentioned this before, but my son brought me out a piece of bone Corian a couple of months ago - it was a reclaimed countertop that he found at the Habitat for Humanity store. Measured 72" x 36", 1/2" thick. It had a bullnose around the edge that had to be cut off, and the sink had to come off (couldn't get it in the machine). The beauty of it? He paid $5 for it!
Keep those stores in mind - you never know what you're going to find.