Wow, there is so much under 500K these days!! In Manassas try zip 20111 (beautiful homes off the PW Parkway); in 20110 is Sumner Lake (new and wonderful) or Robnel/Downtown Manassas (old and wonderful - might be 20109); in I think 20109 you can find 80s/90s homes on acreage such as Woodbine Woods. One layer out will find you in Centreville (Fairfax County - I kind of regret to tell you that living in Fairfax is more prestigious) or Bristow, new and great for families, or Haymarket, holding value, kind of "golf course community" type. Let's see, one more layer out finds you in Burke (Fairfax, very nice, but I wouldn't recommend the commute under the circumstances) or in Prince William, Woodbridge (good and bad parts). So much under 500K these days around Manassas - you are lucky - prices have really dropped!