Guy B is in a sorry state to be sure. If I were B I would contact C and inform him of what happened. While also saying I sure did want that blade and after 7 days of trying to contact A got no response.
Would c consider trading for the same deal as was offered to A? Guy C may think about what is proper and honorable in that case.
If not, B should smile,shrug his shoulders and remember it's just a piece of steel,run to his wife kiss her,hug and kiss his children and thank God his life is so full of love! <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />

Peace,