The Prophet of Allah ﷺ forbade intercepting goods being brought to market before they reached the marketplace, and he forbade a town dweller selling on behalf of a Bedouin.
أن نبي الله ﷺ نهي أن تتلقى الأجلاب حتى تبلغ الأسواق، أو يبيع حاضر لباد.
Ahmad narrated it (20119), and Tabarani in al-Kabir (6929), both from the hadith of Ali bin Abdullah (Madini), who said, Muaz narrated to us, my father narrated to me, from Matar, from Hasan, from Samura, who said, and then he related it. Its chain is hasan because of Matar, who is Ibn Tahman the scribe, about whom there is disagreement, though his hadith is hasan when it does not contradict others, for he used to make mistakes. As for Hasan, he is Hasan Basri, the well-known imam, who was a mudallis and narrated with an ambiguous form (an'ana), but his hearing from Samura is established according to the view of the majority.The meaning of the hadith is this. It was the custom of the Arabs to go out and meet caravans before they reached the town and learned the market price, telling them that prices had fallen, that the market was slack, and that demand was low, so that they could buy from them at a reduced price. This resembles deception, so the Messenger of Allah ﷺ forbade it, and gave the option to anyone deceived in this way to have the choice of the transaction. This is the position of Shafii and Ahmad, and the apparent meaning of the hadith supports it. Some scholars of knowledge said that the seller only has this option if the one who met him bought the goods for less than their true price, but if he bought them at their fair price, then he has no option in that case.