Ya know never thought about it but the first one I ever saw was about 1968 or so. My wife and I did yard sales, but seldom, in the early 70s..mostly kids clothes. tween my mother and mother in law we didn't have to buy much in kids clothes. MIL worked in a place called the Nearly New Shop(baby Goodwill). We always got the new stuff
I have really done well at YS here in Wy..see my previous post