AYB is an association for Professional Yacht Brokers.
AYB Yacht Brokers agree to the AYB Code of Practice and are issued with a certificate to reassure clients and buyers.
They have a Brokers profile page and are listed in the AYB Directory
On the private page for AYB Brokers are downloads such as:-
Code of practice, AYB broker logos, AYB brokerage agreement
Royal Yachting Association (RYA)
recommend only using a Brokerage that is a member of a representative organisation.