I lucked out when my springs broke, turns out the girlfriend's step brother in law does garage doors for a living and I got them replaced for parts and a case of beer.
Plumbing has been my reoccurring issue in my house, not sure why but some copper fittings will get corrosion on them and start leaking. Not sure if sweating the fitting on wrong causes it or what. So I turn off the water to the house at the main, replace the leaking part, go to turn it back on, valve stem snaps. That one I was able to finally screw with for a while and get it to open finally. So then same thing happens, leaking fitting, turn off water ahead of the meter this time, replace leaking parts, go to turn it back on.... snap. This time I had to call the city and have them turn the water off to the house so I could replace my main valves... yes joys of home ownership.