Have you not learned anything in your time here yet? The way to get a free knife is to tell a tearful story of how you lost your very precious knife that you cannot live without and now you cannot afford to replace it. I have seen that angle work.
I am not saying all those stories have that as the intent, I am sure most are absolutely true and very sincere (I lost my daughter's knife when we were backpacking), and some very good and sincere people face such misfortunes and post about it just to share and vent without any expectations, but I speculate that there is the odd post that has some expectations attached.
One poster in another place cried that he lost a Sebenza in a trade (or deal, I can't remember) and had the gall to ask forum members for donations to buy a new one, despite the fact that he is constantly buying Sebenzas. It did not work for him but you can give that angle a try.
You can also criticize a brand, without appearing like a troll, and you might get a free knife to prove your criticisms unfounded.
But I am being too cynical, your angle might still work.
It takes all sorts I guess...
P.S. If any of you find a lost Loveless
(small Benchmade Griptilian) somewhere on the Mineral King trail, please return it to me, or just send me any other valuable knife that you have so I can restore my daughters faith in me.
It is somewhere in this vicinity: