I've never come close to selling a gun that I realized I would regret, but I have sold one that I certainly regret selling now. A mint condition 1980 Norinco "French tickler" (look it up
) SKS. I know it doesn't sound like much, but it was a fantastic rifle for what it was. Later on I learned that version of Chinese SKS is perhaps one of the highest quality ever made in terms of fit and finish from any country, and mine looked like it was turned out of the factory the day before I bought it. Shot very, very well. Extreme reliability. Had to sell it to fund a doctor bill during tighter times.
I really wish I could have hung on to it! Now I know not to sell any gun, and I've heard that echoed across so many threads I've read on here and other gun forums to.