Is the seller entitled to retract the sale on the grounds of ignorance of the price at the time of sale?

Question:
This questioner says: Shaykh, a person came from outside the town with a batch of clothing and sold it to the people of the town at a low price. Then he learned that its price in this town is higher than what he sold it for. Does he have the option of retracting due to significant loss?

Answer:
If he was deceived in the purchase, or if the market people—meaning they met him outside the market before he reached the market—then this is prohibited. If he reached the market and found that they had deceived him, he has the option to retract. As for if he sold after reaching the market and a significant loss became apparent, he has the option of retracting due to significant loss. But if the loss is slight, of the kind in which people commonly deceive one another, he does not have the option in this case. Yes.