yeah add a mutimix thing that allows the use of random left over mats for a random item.....

goes to any old venders buys 1000's of cheap mats converts for 1000's of higher value mats and ruins the market value of everything..p

hmmm ok lets re-think this alittle now we totally ruined the markets for every crafter.

just cant be made to work the way you suggest. even with mat tier lockouts youd still ruin the markets pretty substantially.