Minnesota law does not require the use of any particular purchase agreement form for selling your house. However, it is not recommended that you try to write your own purchase agreement if you are selling FSBO. These are the two forms that are commonly used and are a good source of information for the FSBO seller as well as sound legal documents:
1)The Minnesota State Bar Association's Minnesota Standard Residential Purchase Agreement.
2)Minnesota Association of Realtor's Purchase Agreement.
You can compare the two to decide which suits your needs. When people ask me what is the main difference in these forms the answer is--The Realtor's form is much simpler and should be adequate if your sale is uncomplicated. If there are complications you might want to see if the Bar Association Form meets your needs.
The Minnesota State Bar Association's Minnesota Standard Residential Purchase Agreement is available for free online at state bar association's forms. Other forms which may be needed for your sale can also be found at this link.