This is not good. When only a bludgeon can defend you, you are far into dangerous ground. It's best to have a non-legal escape route in reserve. If the amount is small, and the deal fairly impersonal, most people and most companies will ignore a gouging. When the money gets bigger, tensions rise.
Brains become activated.
If you distribute hardball contracts willy-nilly, be flexible. Selling office furniture to middle managers rarely generates a reading. With the former group, there may be no harm done in going the limit. With the latter, cunning contracts always lead to renegotiation. Again, be prepared to kick the negotiations over to someone who can think.