What is the meaning of: “The Messenger of Allah prohibited a resident from selling for a nomad”?

Question:
After this, a message was sent by the listener Muhammad Nu'man from Yemen, saying: The Messenger of Allah (peace and blessings be upon him) prohibited a resident from selling for a nomad. I hope you will clarify this situation?

Answer:
A resident selling for a nomad: the resident is the one who lives in the city, and the nomad is the one who comes from outside, such as the Bedouins who are far from Sana'a. If they bring their goods to Sana'a, the resident does not take charge of selling them for them; they sell them themselves.
Likewise, the one who is outside Riyadh, if he brings his goods to Riyadh, sells them himself; the resident does not sell for him. This is because if the resident sells, he will impose high prices on the people. As for the nomad, if he sells himself, it will be cheaper for the people. For this reason, If a group of Bedouins arrive with sheep, or milk, or dried cheese, or anything else, they sell them themselves so that the people can benefit from them. If they arrive in Sana'a, Taiz, Riyadh, al-Ahsa, Hail, or Madinah, the resident does not take charge of selling for them; they take charge themselves and sell them themselves. This is because it is closer to the benefit of the people, and the Messenger of Allah (peace and blessings be upon him) said: If the resident takes charge, he will impose high prices on them. Yes.

The presenter : May Allah reward you with good, and may He do you good.