Consideration means there must be an exchange between parties in a contract through bargaining. The thing bargained for can include promises, benefits, or detriments. For a contract to be supported by consideration, the bargaining must cause both parties to either give a benefit or suffer a detriment. Courts generally do not evaluate the adequacy of consideration as long as something of value was exchanged. Exceptions apply for preexisting duties, liquidated debts, and modifications to sales of goods contracts.