Illinois home sales decreased 11.6 percent over previous-year levels in March while median prices increased 9.7 percent, according to the Illinois Association of REALTORS.  Statewide home sales, which includes single-family homes and condominiums, in March 2014 totaled 9,929 homes sold, down from 11,226 in March 2013.  The number of houses on the market in March was down 15.8 percent compared to a year earlier, dropping from 69,869 homes for sale in March 2013 to 58,858 this year.  The statewide median price in March was $148,000, up 9.7 percent from March 2013 when the median price was $134,900.  The median is a typical market price where half the homes sold for more and half sold for less.  32 of 102 counties in Illinois showed annual home sales increases in March 2014, while 42 counties showed year-over-year median price increases.