I second @PhilipDAth answer here. Easy way to separate the network from the existing organization along with the licenses and also the best way if they want to keep most of the configurations as it is.
However, if the new owners want to start from scratch and don't want to do anything with your configurations, It is easier to create a new organization and transfer the equipment and the licenses. Starting from scratch would be a better approach if they have to change too many settings from your existing configurations.
Cheers!
Raj
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