I also get items at the thrift store, just for the fabric or trim. And an estate sale with fabric and sewing stuff is heaven. Several summers ago I was in the middle of chemo and sick as a dog. My husband talked me into going to a sale, It was a quilters and there was one room full of fabric. They had not sold much of the fabric and the lady running the sale got me a chair and I sat in the room and she bought the fabrics to me to pick out what I wanted. she was so nice and I bought 3 boxes of high quality cotton quilt fabric. that was just about my best local find.
My daughter and I like to get items from the thrift store and cut them up and make things: flannel shirts made into throws and skirts, men's shirts made into blouses and skirts, T-shirts, bleached which changes their color, made into quits tops and skirts, felted sweaters made into vests, I could go and on about the items we have made, Another is skirts made from bandanna hankies or Hawaiians shirts. Recently made a necktie skirt, I decided it needs to be lined, I need to get fabric to line it.
Love thrift store stuff.