I encountered a woman at a flea market on Saturday offering baskets of recycled yarn, which she confirmed was obtained by ripping out knitted garments. She was purposefully vague about where she buys them, but told me she has learned which brands are most likely to yield long continuous lengths of yarn. It was all quite clean and neatly wound with a mechanical winder, though she would not make any representation as to the fiber content, weight or yardage. WYSIWYG. The yarns I bought immediately melted when subjected to the flame test at home, and I imagine that most of her merchandise is acrylic since it is salvaged from commercial garments. Anyway, the vendor told me that she had reserved her space for the entire season, so I'm pleased to have found a source of finer-weight yarns at very inexpensive prices.