Repairing a screen door is usually cheaper than replacing it, especially if the frame is intact and the damage is limited to the screen or rollers. Repairs typically cost no more than a few hundred dollars, while a complete replacement can cost an average of $500 or more. However, if you frequently pay for repairs, replacement may be more cost-effective in the long run. If you need help, here's a link to a Los Angeles screen door repair service; I used them for my screen door repair.