Musannaf Ibn Abi Shayba 13:438

Abu Abd al-Rahman, meaning Ibn Makhlad, narrated to us, he said: Abu Bakr Muhammad ibn Abd Allah ibn Abi Shayba narrated to us, he said: Hushaym ibn Bashir narrated to us, from Amr ibn Dinar, from Ata, from Ibn Abbas, that he saw no harm in a man giving a garment to a man and saying: "Sell it for such and such, and whatever you increase [the price] by, it is yours."