While the terms of non-exclusive agreements can last one or two months, exclusive contractual terms typically vary between 30 days and a year. If the buyer decides to then buy a property that has been presented to him by the agent, he owes a commission to the agency. Exclusive representation gives the broker/agent the opportunity to negotiate on behalf of the buyer with unsusered sellers (e.g.B. for sale by the owner). In some cases, because the seller`s agents know they have to share the commission with another broker, they may be inclined to sell the house to someone who pays a lower purchase price but is not represented; In this way, the seller`s agent receives his entire commission (by attracting another customer) instead of just half. .