Book Two: Nominate Contracts · Section One: Contracts of Transfer of Ownership · Chapter One: Contract of Sale · Part One: Definition and Elements of the Contract of Sale
The price is what the contracting parties have agreed upon in exchange for the subject matter of the sale, whether it exceeds or is less than its value. The value is the objective worth of the thing, assessed without increase or decrease.
Interpretation and application must be checked against the official text and current version.