Yes, Classipress already includes an advanced search feature that can filter cities or any custom fields values that you have set up.
There is the possibility of providing classipres with another guide to include / filter by cities?
There is no annual cost to purchase the theme. You can check the different license package here
http://www.appthemes.com/cp/signup.php.
and how to acquire and at what cost monthly or annual usage for the site in Portuguese?
