Is the contract valid if the offer and acceptance differ in the value of the dowry?

The offer and acceptance are conditioned upon the acceptance conforming to the offer, unless the discrepancy is in the interest of the one who initiated the contract. For example, if the offeror says: "I marry my daughter to you for a dowry of one hundred pounds," and the acceptor says: "I accept to marry her for two hundred," the contract is valid because the acceptance includes something more beneficial. The same applies to a sale: if the seller says: "I sell it to you for one thousand," and the buyer says: "I buy it for two thousand," it is permissible, because one who accepts a larger amount also accepts a smaller one. If the seller accepts the increase, the contract is concluded for two thousand; otherwise, it is valid for one thousand. Therefore, the marriage is valid.