they secured a purchaser at price stated, erroneous.

In an action by real estate agents to recover commissions, it was error to instruct the jury that, if defendant agreed to give plaintiffs a particular sum in case they sold his farm at a specified price, plaintiffs could not recover unless they sold or procured a purchaser for the property at the price specified, defendant having sold the property to the purchaser procured by plaintiffs, for a price less than that specified, and to that extent availed himself of plaintiff's exertions. Wetzell v. Wagoner, 41 Mo. App. 509.