In addition to contacting the agents here on Trulia, check out Zillow.com (although in many cases the values there are off, the trends shown are pretty good).
Hope this helps,
Beachfront Realty, Inc.
As a real estate professional, I can show you the best comparables for the home that you are interested in. Please feel free to call me or email me and I will be happy to furnish you with the information.
CRS, GRI, SFR
Utah's Best Realty