Now we’re getting somewhere. If you sign that, it means the agent will be working for you (within the scope of the agreement, which might be limited to certain areas, dates, price ranges, etc., etc.). It might be limited to just this one property. You will be his client, in the same sense that a listing agreement makes the seller a client.
The BA should spell out the terms under which you will pay a commission, which might be never. As I have said upthread, my company will accept whatever commission is offered by a cooperating MLS broker, and the buyer typically pays nothing.
If you do not wish to sign the BA, the agent should hand you a Disclosure to Customer form, which notifies you that he will be working for the seller. You will not be his client, but his customer, and he will be limited as to how he can help you. He cannot give you opinions as to price or value, for example, but he can supply you with the data for you to make your own decision.
