I also sell knifes, but I dont make the blades myself, only the leather sheath and the wooden handle if someone ask for that.
Also, they are a bit more on the "weapons" side than your ones, regarding size and shape. But I guess yours are perfect to take someones appendix out if they are well sharpened. :)
And to be honest, I would rather trade them for silver or gold than for BTC - but perhaps I'm just oldfashioned.