There is a Goodwill outlet less than a mile from my house - they sell clothing super cheap, by the pound. Something like 30 cents/lb. Most of the staff there is mentally challenged so it can be an interesting shopping trip, but almost always fun. Eventually, when I clear my stash out some, I'm going to start hunting for wool there.
My best score so far - I found a really nice big light box, in perfect shape for $4. Googled it when I got home and retail is well over $100 and specs & reviews are really good on it. Score! It's exactly the right size for freezer paper stencils, lol.