I used to frequent Goodwill back when they actually had good stuff. I found an Edward S. Curtis photograph there several years ago that was appraised for $300 by a Seattle company, among other things... probably worth more now. However, once eBay happened, Goodwill started their own site, and now they put nothing but junk on their shelves. I keep waiting for them to taper off their net site and get back to putting good stuff in the stores again. Occasionally, though, something will slip through. You're right, Vincent, about the books! But I've found better ones at library sales, and for much cheaper.
Janine, I kept most of my thrift store art when I downsized. Most of it in the "shabby chic" roses style that's not so hot today, but I absolutely love it and just couldn't part with it. Sigh... :)