Protein Blenders, Inc., made a contract with Gingerich to buy from him the shares of stock of a small corporation. When the buyer refused to take and pay for the stock, Gingerich sued for specific performance of the contract on the ground that the value of the stock was unknown and could not be readily ascertained because it was not sold on the general market. Was he entitled to specific performance? [Gingerich v Protein Blenders, Inc., 95 NW2d 522 (Iowa)]