A Minnesota Buy-Sell Agreement is common for "closely held" corporations and other business entities; for example, when there will be a handful of owners. Generally, in Minnesota, a contract for the sale of real estate must be in writing to be enforceable.1. Sale of Property. A real estate purchase agreement must be carefully constructed ensuring that it covers all the bases to be seen as a legitimate contract. Business Bill of Sale: This document outlines the sale details, including the purchase price, assets included, and any warranties or guarantees. There are generally five steps involved in the process of buying or selling a Minnesota business. Read our comprehensive guide on how to make a Minnesota purchase agreement using our professional purchase agreement template.