One thing I regret selling was my phone a Vivo brand. I was broke a little bit then in my first year in the university so I sold it one of the dry cleaners at a cheap rate. But then I did regret later for selling the phone at a cheap amount . Also the phone had some special features that the other phone i was using didn't have.
But then after all those shenanigans I still got myself a new Samsung A13 mobile phone which is what I have been using from then to now.