Draft a purchase agreement to get in writing some of the things that may result in a legal dispute further down the line. Although this may seem to imply a distrust of the other person involved in the transaction, this document ensures that important points, such as when and how payment will occur, how any deposit that may be transferred will be handled or how the lending of the car for inspection will be arranged, are clear to both parties. If these points are not clear, problems could result and one of the involved parties could lose out in the end.

Be congenial when bringing up the subject of a purchase agreement. Be sure to point out that the purpose of such an agreement is to protect both parties and to avoid confusion.