There's really too many variables here to answer correctly or provide real information. Jason was correct, many of the 3rd party sites do not update as regularly or accurately as our MLS. If you are saying it's been listed but not sold after 3 years on the market - it could very well be the price. If they came on the market 3 years ago too high, they could be chasing the market down and not caught up with current values as yet. There's the possibility of deals falling through if buyers couldn't get financing, without knowing the facts behind the property, anyone of us that answers would just be "guessing". If you have more information would be happy to investigage.
I'm sure the house has sold but the record was never updated on zillow. These third party websites sometimes don't do a very good job getting up to date info. If you give me the address of the property I can give you a better idea of what is truely going on.
Kevin Flynn Realty, Inc.