In tough economic times, shoppers take haggling to new heights By Michael S. Rosenwald Sunday, January 31, 2010; B01 The price tag on the smooth pair of Cole Haan loafers at Macy's said $148. I considered that a fair opening bid. Standing across from the salesman and the cash register, I said, "Can you knock off 25 percent?" The salesman said, "Can't do it." But I pressed on: "I'll get them on the Internet or at one of your competitors, so let's just do this here." Salesman: "Geez. You're like the second person who has tried to do this today."...