An existing customer of an agent who is registered in State Z contacts the agent to inquire about selling 1,000 shares of ABCC Corp. - a thinly traded stock that is sometimes quoted in the Pink Sheets. The agent attempts to locate a buyer for the shares for the customer, but cannot find one. One week later, a new customer contacts the agent, asking him to buy 1,000 shares of ABCC Corp. The agent contacts the existing client to see if he is interested in selling these shares. This action is: