You’re buying a house with home security devices
A new house may come with an installed home security system. All the components function well, are installed in the right spaces, and are ready to go. In this example, just turn on the phone to call and establish a new service contract. A Vivint expert will still show up to make sure there are no integration problems, and they might offer ideas on upgrades. It's a fast visit, and you can get your 24/7 monitoring set up without paying for any new components -- unless you make additions.
The outgoing owners can transfer an existing Vivint contract to you for a one-time transfer cost to make the transfer simpler. If the outgoing residents are downsizing to an apartment or retirement community, you keeping the home security contract might be an addendum of the sale.
You are looking to move and bring your old components with you
You might want to take your old Vivint system with you to a new home when you move. Luckily, it's pretty easy to do, as most smart devices are plug and play. You can remove each alarm or camera by yourself or contact a professional expert to come and take care of the system. Then a pro will set up the same features -- and any smart items you want to add -- in the new place. Your home security contract will stay the same.