If you don't know how to fix and repair the AC system yourself, then I wouldn't bother as you will have more money into the car than it's worth. But if you are like me who really never worked on AC systems before and had a fiance that said that she needed the air to work in the 92 Cavalier of mine that she drives and that she would buy all of the equipment I needed to fix it, it gave me the incentive to learn how to do this type of repairs and now I know how to.
Since 2006 when I fixed her car, I've repaired probably around 10 vehicles with only one failure.
The AC in her car still works good after over 100,000 miles and almost seven years of use. The AC in the 92 Cavalier that I drive that I also fixed, will freeze you out of the car. Of course, I kept that one R12.
Both of these Cavaliers are our daily drivers even though we both have several other vehicles we can drive and for our use, we want the AC to work. It comes down to how much trouble and money you want to spend vs your ability to live without it.
Wayne