Is Zayd entitled to demand the original sale after the store canceled the purchase operation due to a pricing error and refunded the paid amount except for the shipping fee?

If a seller offers an item at a price significantly lower than its value, and the buyer strongly suspects that the seller has made a pricing error, then it is not permissible for the buyer to purchase it.

If the sale has been completed and the seller claims an error in the price, his statement is accepted with his oath, according to many scholars. The Hanbalis, however, maintain that the seller's claim is not accepted without evidence. The Shafi'is hold that if the buyer confirms it, it is accepted; otherwise, neither his statement nor his evidence is accepted unless there is a strong likelihood.

If the buyer confirms the seller's claim of error, the buyer's statement is accepted with his oath, and the buyer is given the choice between paying the difference or rescinding the sale. The seller bears the shipping cost because he is the cause of the rescission.

However, if the buyer does not confirm it, and there is no possibility of error, the claim of error is not accepted without evidence.