I've regretted selling most of the guns I've sold (Other than a Beretta CX4, that was trash). Even the guns I've sold to upgrade I regret selling.

For example I sold a basic Para 1911 that was a SOLID gun. I loved it. But I lusted after a Sig Emperor Scorpion so I figured I'd free up some money to get it.

I did. And now I wish I had both guns.