Originally Posted by Steve007101
Update: Actually I just found out you get the Item Collector achievement when you've bought at least one of all items... heh, oh well, I just have my Holy Waters to Max out now.
I have done that many times so far and have not unlocked that Achievement. Right now I only have a few more items left before I max all of them out.
Maybe you have to pick up all the items within the game to unlock this. If I'm wrong on this, someone please feel free to correct me.