This Addendum is intended for use in the City of Oakland. The Seller agrees to sell, and the Institution agrees to buy, the Collection for a total purchase price of ______ ("Purchase Price").The Institution shall. With our free Sales Agreement form, you'll be ready to print or download your contract in no time. Sale Agreement - Free download as Word Doc (. This form is intended for use with the California Association of REALTORS® forms RPA "Residential.