Guys I pick up box full end mills today,the quality is mix.Few I believe is new,some are still very sharp and some not so sharp.Some look like they were regrind by hand and some that is just dull and some are double ended which one end have been broken off.I know that I got way more than my moneys worth just by the ones that are new or look like never been used before so this leaves me with wondering what to do with the ones that broken off and ones dull.Do you trash them or hold on to them maybe repurpose them for something else.Most are HSS and there are some that says Cobalt 2%,some just say cobalt.My question is what to do with ones that I would say go in baggie and put in the drawer w/black hole?? What do you do with your end mills thats no longer any good?