Who pays transaction broker's fees?

[Paweł Terlecki]

Hi, I am sending an offer for a condo in Florida. I am not using a buyer's agent due to pretty bad experiences so far. The listing agent asked me to sign a transaction broker agreement with his firm that includes a compliance fee of $499. Do I need to sign the agreement aka hire the transaction broker or should that be on the seller's side? Is the fee justified or should it also be covered by the seller?

Thank you, Pawel