. A contract normally requires one party to make a reasonably detailed offer to do something -- including, typically, the price, time for performance, and other essential terms and conditions -- and the other to accept without significant change. For example, if I offer to sell you ten roses for $10 to be delivered next Thursday and you say "It's a deal," we've made a valid contract. On the other hand, if one party fails to offer something of benefit to the other, there is no contract.