Website like Trulia, Zillow, and Realtor.com do not provide the most accurate, up to date information in homes that are listed for sale. The best way to receive the most accurate and up to date information is to have a Realtor send you properties listed in the Multiple List Service, MLS. This is a state wide system used my real estate professionals. You email can also be added so you receive notification as soon as a property becomes listed within the entered search fields.
I would be glad to send you updates of the market in Frederick. Feel free to email me, firstname.lastname@example.org