Congrats on selling your business! Here's how to switch your SortScape account to the new owner:
Go to the employees page, create a new employee for the buyer and assign them the "administrator" role.
Next, on the billing screen, swap out the billing email and credit card info with the new owner's. (You can also remove your credit card information and let the new owner add it themselves.)
Lastly, the new owner should deactivate your login on the employees page - you won't be needing it anymore.