"Beware of dealers who won't use contracts. Requesting someone to enter into a formal agreement does not imply that you are distrustful. It merely attests to the fact that being human lends itself to being misunderstood and misinterpreted. Contracts can help compensate for human frailties. Another important reason for using contracts is that it will save you a lot of time and energy in having to reinvent the wheel each time a situation arises that needs some sort of clarification."