Hadith 1520
Abu Hurairah (RA) reported it directly from Allah's Apostle (ﷺ) : The townsman'should not sell for a man from the desert (with a view to taking advantage of his ignorance of the market conditions of the city). And Zuhair reported from the Holy Prophet (ﷺ) that he forbade the townsman to sell on behalf of the man from the desert.
Hadith 1521
Ibn 'Abbas (RA) reported Allah's Messenger (ﷺ) as saying: The riders (carrying merchandise) should not be met in the way, and townsman should not sell for a man of the desert. The narrator reported. I said to Ibn 'Abbas (RA) : What do these words really imply-" The townsman for the man of the desert"? He said: That he should work as a broker on his behalf.
Hadith 1522
Jabir (RA) reported a similar hadith from Allah's Apostle (ﷺ) through another chain of transmitters.
Hadith 1523
Anas bin Malik (RA) reported: We were forbidden that a townsman should sell for a man of the desert, even if he is his brother or father.