I've done alot of knife buying/selling/trading since I really got interested a few years ago. For the most part, I had no regrets about the knives that I sold/traded/gave away. There are two that I wish I could have back though: Al Mar Sere 2000 and Kershaw Boa. Looks like I'll have to put those on my short list of knives to buy. How about you guys? What about the one that got away?