Been doing the Goodwill thing for years. Have to be in a restful mood though to get thru the garbage to find the real gems. Don't overlook the clothing racks, have found beautiful print dresses and men's shirts which result in nice cuts of fabric when cut up. One Salvation Army in my area gathers up "large scraps" and stuffs them in large plastic bags (abt $1.50). Disabled Veterans Shops, are also a good source for fabric finds - most thrift shops are a gold mind, you just have to be in the mood to look through their stuff. For the frugal quilter who can't always find money in the household budget for a side trip to Hancock or Joann's these places are a Godsend.
Happy Holidays to all.
Janet