Ibn 'Abbas (RA):
A man gave away a she-camel to Allah's Messenger (ﷺ). So he gave him something in return for it and asked, "Are you pleased?" He replied, "No." So he gave him more and asked, "Are you pleased?" He replied, "No." Again he gave him more and asked, "Are you pleased?" He replied, "Yes."
[Reported by Ahmad and Ibn Hibban graded it Sahih (authentic)].