Lubricating hinges, tightening loose bolts on the track brackets, and testing the auto-reverse safety feature are all fine to do yourself, and worth doing twice a year on a door this age. Replacing a torsion spring is not a DIY job on these doors. The spring is wound under enough tension to break a bone if the winding bar slips, and on 80s and 90s torsion systems the drums and cable attachment aren't always the same spec as what you'll find in a big-box kit today, so a mismatched replacement can throw the whole system out of balance. If a cable has jumped the drum or a panel is bent at the bottom roller, leave it alone and call it in. The one place a homeowner can genuinely save money is diagnosis: if you know the door is original to a 1990s build and never been serviced, say so when you call. It cuts the guesswork.