When properly built and overhauled every year, they serve several beneficial purposes, such as. (B.dem purchase of an owner`s interest in the corporation due to a triggering event, whether voluntary or involuntary; limit owners to parties who want non-selling owners to be co-owners and potential business partners; Provide an agreed price at which buyers and sellers can do business before a conflict and valuation bias occurs between buyer and seller; Provision of agreed terms for the payment of the transaction price in connection with the sale; and bind the additional owners under the terms of the purchase and sale agreement.