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Here's A Link To a "Fair Market Rent Calculator" provided by HUD
Real Estate investors ask "How much could this rent for?" and tenants ask "Is this a fair rent?"  Well I found a government website that takes the liability off of us brokers.  It can be found in the mish-mash of HUD web sites and information. 
For my area it is pretty accurate.  Rents here are between $700 and $1500 a month year round, depending on bedrooms and location.  With more waterfront that any other town in the country, Falmouth has some good locations.
Real estate in Falmouth MA can be rented by the week in the summer and by the month the rest of the year for a seasonal rental property.  For a year round rental the rate stays the same of course.  The HUD calculator seems to have a good idea of real estate values here. 
It is called the "Fair Market Rent System." Apparently it is current for the year 2009.  Here is the link:  http://www.huduser.org/datasets/fmr/fmrs/fy2009_code/index.asp?data=fmr09
Happy Selling and Listing!
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