Sales of Chicago-area homes and condos priced over $1 million dropped 9 percent during the first three months of this year, according to Re/Max research. The median sales price of single-family homes dropped 2 percent to just under $1.39 million, compared with a year ago. And it took significantly longer to sell a home. This year, sellers of luxury homes had them on the market an average of 155 days before arriving at a deal with a buyer. Last year, it was only 118 days.