Where I can find a studio for $500 or less a month in PA ?

Preferably in the Lehigh Valley area ( Allentown, Bethlehem, Quakertown, Easton etc ... ) I've tried apartments.com and some others ... but they all start in $650 or more. What I really want is something to start and A NICE NEIGHBORHOOD U KNOW... I'm not looking for luxury or something special, but SAFE.