I must confess I love garage sales, yard sales and estate sales. I enjoy buying O.P.S. — “other people’s stuff” — that brings back a lot of memories of more innocent times.Flea markets and antique shops are different. That’s just buying things from someone who has purchased articles from others for resale themselves.In southwest Michigan, where my wife and I have a second home, there are literally hundreds of such sales every year. The best part is the opportunity to visit with the …