Well...no. I don't have any of the guns I regret selling.
But, all of those I
have sold, I regret. And I can count them on one hand. Probably takes all five fingers. I can't bear the pain. No more get sold, just bequeathed to my daughter who insists she wants all of them. And she has volunteered to take care of me in old age should that be required. If she wants to have a big sale to fund my care, I guess that is her business.
Correction: I can think of one 1920's M&P 4th in flaked nickel that I got a very good price on and don't miss one bit.