Way back when, I did lots of impulsive selling and trading. There were more than a couple I kicked myself for getting rid of. In the last 15 years or so, I've replaced just about all of them with a duplicate or something even nicer.

All except for my very first S&W, which was a 4th Model Safety Hammerless, .38 S&W, blued, 2" barrel, and in excellent condition. That one I'm still sorry about, and I'm not holding my breath waiting for one I can afford.