A cooperative sale means a sales transaction involving two real estate agents who work at different brokerages.
A cooperative sale happens when a buyer is introduced to the property and represented by a buyer’s agent who works for a different company than the listing agent who is representing the seller.
These two agents agree to work together on the sale. In most cases, they split the commission paid by the seller equally. Many US states and MLSs have rules to govern these kinds of transactions. A handful of states even made it illegal for a buyer to be represented by the same agent who represents the seller (dual agency).