Property Sale Contract Price Revision Validity

The case involved a dispute over a contract for the sale of an immovable property where the stipulated price was subject to revision based on an external index, and the buyer sought to enforce the original price, arguing the revision clause was null and void. The court rejected the appeal, reasoning that a contract provision stipulating that the price be subject to a fluctuation index, even if external, does not violate the fundamental requirement of a determined or determinable price in a sales contract, as the method for calculating the price adjustment was clearly established, rendering the contract valid and enforceable as written.