If you don't need a seller's agent, you can just pay the buyer's agent's commission. The buyer's agent would not be representing the seller. The buyer's agent would prepare the paperwork for the buyer and represent the buyer only. The seller would then have to prepare the seller's paperwork and make the required seller disclosures. An attorney could assist the seller with the seller's paperwork.
Some attorneys specialize in assisting sellers who sell without an agent.
They charge a nominal fee by comparison. For this, the broker charges a fee, which is negotiable, although most individual brokers have a standard fee they have set for their services. Of course, although the seller feels he is the one paying the entire commission, it is actually being funded by the buyer as part of the purchase price. If the seller has no need for the services of any agent, he is, of course, free to sell his home himself. Many such sellers offer to pay a commission to an agent who represents a buyer to encourage agents to bring the property to the attention to any buyers they represent.