Fairfax County in general is one of the safest places in the world to live. While agents are prohibited from talking about the people who live in certain neighborhoods, they can speak to the houses found in particular neighborhoods.
22309 is found in the Mount Vernon District of Fairfax County. Homes here are among the most expensive and luxurious in Northern Virginia. In the same zip code, you'll find some of the most affordable real estate in Northern Virginia. Northern Virginia has a highly efficient market with well-informed and well-educated buyers and sellers. Generally the prices you see that are low ... are low for a reason. And the prices you see that are high . . . are high for a reason.
I highly recommend you pick a local expert to help you on your home search. You can read more about Mount Vernon at the link below.