See if you have the materials/ability to make your own sheaths (which I do not have either) then I don't see why not just pay an extra coupla bucks.
But for newbies to the "great knife world" like myself, the sheath deal is a MUST. And trust me I will probably get two, and I won't sell either but I may very well keep one as a safe queen and one as a user.
May even give someone one for christmas this year (wouldn't you like that to be you? lol).