To reproduce this: seller n/alex yeoh p/91234567 e/t@gmail.com
In the addressbook, the person is a buyer, but the output message is This seller already exists in the address book. This is a minor issue, but it may be confusing to users. Perhaps "seller" can be changed to "person" instead to be more general.
This is the current message:

To reproduce this:
seller n/alex yeoh p/91234567 e/t@gmail.comIn the addressbook, the person is a buyer, but the output message is
This seller already exists in the address book. This is a minor issue, but it may be confusing to users. Perhaps "seller" can be changed to "person" instead to be more general.This is the current message:
