Well, I just bought a slightly used cqc-12 for ebay. I currently own a cqc-13 and the look quiet similar. I just enjoy that extra confidence of the frame lock. Any opinions on either of theses knives would be appreciated. -You (I) don;t generally seem to hear too much about either of them. I actually paid less for the 12 than the 13 too. -But it's always a gamble with ebay. -Thanks.