Re: old window Repair vs. Replace debate
for technical reasons, mainly for energy efficiency definitely replace the windows, even though your in a mild climate during the summer i more energy efficient window will keep a conditioned space cooler. having old windows is simply going to place more strain on a central air conditioner.
you can very easily save the old sashes and use them in interior walls as transom lights.
not to mention the older a window gets the more maintenance it requires. vinyl isn't the only type of window, fibreglass and new wood windows can be use but they cost more
fire up the saw and make some dust