If the opener runs, you have a bad button. If you have an older-model opener, an inexpensive buzzer button might function. If you have a newer opener that has a light and also a locking alternative on the button, acquire the one developed for your design. A new one must cost you about $15.
When you get the equipment out, you could remove it from the shaft with a strike, or you can acquire a set that features a new shaft. Make sure you lube it all up when you're done. The gear alone needs to cost you less than $20. A complete set that has the shaft will certainly set you back closer to $40.
Home centers market garage doors that are not particularly tough to mount. Prior to choosing to minimize your garage door expense by installing it yourself, call the producer for setup guidelines. If the project looks convenient, go for it. As with the majority of home renovation tasks, the most effective way to decrease garage door costs is to do it on your own.