Buyers always want to obtain goods at the lowest price. To do so, a buyer agent can have multiple concurrent negotiations with all the sellers. It is obvious that if the buyer obtains a good price from one of the sellers, the buyer should have more bargaining power in negotiating with other sellers. Then, other sellers should offer a lower price in order to make a deal. In this way, the concurrent negotiations mutually influence one another. In this paper, we present an algorithm to enable mutual influence among multiple concurrent negotiations.