you can always place your INFI for sale or trade in the regular for sale or trade forum.
Why not place your knife in both. There is not a rule against that, If I am not mistaken.
While there isn't any rule against it, I think your post would be moved by a mod to the Busse sale forum unless you had other types of knives for sale there. If you wanted to sell Busse's on the main forum, just put a swiss army knife for sale in the same post and mark it for $500