I am selling my house and literally five minutes ago just got off the phone with my realtor telling her to make a counter offer to a buyer and to include in the

I am selling my house and literally five minutes ago just got off the phone with my realtor telling her to make a counter offer to a buyer and to include in the counter offer that our security system isn't included. We have intended on taking our SimpliSafe security system to our new house. Now I read this.