not meaning to kill the party but if you go to http://www.listia.com/rules in the Prohibited Auction Items section it lists "Firearms, weapons, knives over 2" & explosives" so since this is obviously over 2" i would recommend either removing it or people flagging it (i'm guessing listia wont like the distribution of prohibited items) , like i said not meaning to kill the party but this isn't the appropriate place to put a knife this long since it's illegal to own one in most cases and in most states if its over 2" long
As a knife lover, I'm glad that no one has flagged you. Some people get a little weird about knives, but for a lot of people they are for collecting not for use as a weapon or a means of defense. My husbnad and I have a great many knives and swords that we have collected over the years. Hope you get lots of bids!! Keep posting'em!