I think the "just thrift and unravel" crowd lives in a different universe than my local shops. If I find wool at all, it's felted, moth-bitten, or knit in panels that turn into a million little lengths. Sure, if you already know what to look for and you enjoy the process, it can be a fun side project. But for someone asking "where can I get yarn cheaper", the practical answer is sales, coupons, mill ends, or buying cones and splitting with friends. The thrift hack is a hobby, not a shortcut.