Upon returning to the game at the start of 2.0, I was eager to customize my retainers much so that I wanted to clean out and toss any old junk that I had... the first thing was about 20 or so Cracked Materia (ranging from I to IV) only to find out some weeks later that I could've turned said materia into whichever I wanted and could've made millions off of...

Just discarded them all... checked the box to accept and everything... it still wounds me.