Consumer reports lised out the average life for appliances these days. Its a bit depressing to see how short some items should live. And a bit nerve wracking cause I have several appliances that are twice as old as the ones listed. Some cases, 3 times. Either I am that good, or I am living on borrowed time.
http://www.consumerreports.org/cro/news/2009/03/by-the-numbers-how-long-will-your-appliances-last-it-depends/index.htm