What is the ruling on a sale with profit conducted by the buyer before the expiration of a stipulated option period?

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If a buyer stipulates an option and then sells the item for a profit before that period ends, the profit belongs to the buyer who initiated the sale, as the obligation to pay was established upon the initial offer, meaning their option is voided and the sale becomes binding upon them. This applies when the option is stipulated solely for the buyer. Similarly, if the ruling is that ownership is not transferred until separation, and the option belongs to both parties or only the seller, then the seller's transaction concerning the item is valid because they possess the ownership and have the right to invalidate the other party's option.