It's not really hard to do a battery change if you have the correct tools. Don't even consider a plyers and screwdriver repair. For show watches of average value I would do it no question with many videos online to guide you. For high end Omega, Rolex, etc that are pressure tested and gasket sealed it would be wise to just bring it in. Most times it would be a good opportunity to get it calibrated and have all the rings changed for a lifetime of ownership. Just my view experience with my Other collection habit other than pinball!