Paying an agent's commission on a real estate transaction is the responsibility of the seller*. The commission paid by the seller is the same, whether you use a Buyer’s agent or not. If a buyer’s agent is used, the commission is split between the seller’s agent and the buyer’s agent. If a buyer's agent is not used 100% of the commission goes to the seller's agent.
The only people benefiting from your lack of representation are:
*Rare exceptions may occur when there is a For Sale By Owner (FSBO) or a Discount Broker offering in which case compensation for the Buyer’s Agent is usually negotiated in the purchase contract and may be paid by the buyer, the seller or both parties.