The SA and GW have sheet sets and they aren't cheap either and some are thread bare. I usually go to estate sales for mine. Last one I went to for sheets, I got 5 sheets for $5.00 (king size). Usually, the last day is the best day at estate sales, because they want to move them. If you're looking for specifics then be there early the first day. Some thrift stores that are for profit are the resale/retail/pre-owned/gently used. Those aren't best. They sometimes act like an antique store.