The price depends of course upon the size of the window/door and whether you want the shutter electrically operated or opened/closed by hand. As a guide (prices may have risen since 2017 when we were installed) a window size 150 x 140cms and hand operated was 6000 pesos; a window 180 x 140cms electrically operated was 20,300 pesos. We had 2 electrically operated installed and the remainder are hand operated, including a shutter for the front entrance door. The 'hand operation' is just a self-retractable strap, very easy to use. The sense of security at night and when we are away has been well-worth the cost, plus the fringe benefits of a large reduction in the outside noise (cohotes, dogs, etc.)