Security systems and all other preventive installations are a good investment for your home.You cartainly have it at your home.This is a plus if your intent to sale your old home and move out.If so do not forget to provide some quick instructions for maitenance and usage to the new owners.Before moving out contact your security company or agent and inform them that your are changing your location but there will be another people who are interested to use the allready installed security system.Remember to show the new ownrs where are placed the security devices and explain them in details the working principles.There are so many kinds of security installations so you should specify the options of yours.Provide them the security codes and the alternative passwords (if available).