From the Prophet (ﷺ): "He prohibited meeting the owners of the goods."

There are narrations on this topic from 'Ali, Ibn 'Abbas, Abu Hurairah, Abu Sa'eed, Ibn 'Umar, and a man from the Companions of the Prophet (ﷺ).
Jami` at-Tirmidhi Book 14, Hadith 19
← Previous Hadith "A man among the Ansar decided to free a slave of his after his death. He died but he left no wealth behind beside the slave. So the Prophet (ﷺ) sold him and Nu'aim bin An-Nah-ham bought him." Jabir said: "He was Coptic slave who died during the first year of the leadership of Ibn Az-Zubair."

This Hadith is Hasan Sahih and it has been reported through more than one route from Jabir bin 'Abdullah.

This Hadith is acted upon according to some of the people of knowledge among the Companions of the Prophet (ﷺ) and others. They did not see any harm in the sale of Mudabbar. This is the view of Ash-Shafi'i, Ahmad and Ishaq. There are those among people of knowledge, among the Companions of the Prophet (ﷺ) and others, who disliked selling the Mudabbar. This is the view of Sufyan Ath-Thawri, Malik and Al-Awza'i.

Jami` at-Tirmidhi Book 14, Hadith 18 Next Hadith → "The Prophet (ﷺ) prohibited meeting the goods being brought (to the market). If someone were to meet them and buy them, then the owner of the goods retains the option when he reaches the market."

This Hadith is Hasan Gharib narration of Ayyub (a narrator). The Hadith if Ibn Mas'ud is a Hasan Sahih Hadith. There are those among the people of knowledge who disliked meeting the owners of the goods, saying that it is a type of deception. This is the view of Ash-Shafi'i, and others among our companions.

Jami` at-Tirmidhi Book 14, Hadith 20