I love technology. I often get calls from customers that are interested in a property on a web site which is no longer available. I do not mind but it is very frustrating to the customer to see a real estate property they are interested in and it is no longer available. It would seem it is easier to post a property than remove it from cyberspace.

From my experiance, the MLS is more accurate although I have not done a formal study. Perhaps it is best to use the MLS data because it allows realtors to put in more  and  narrower parameters.