Very useful for mass crafting.
For example: you want to skill up Armorer by crafting your x4 stacks of 12 Copper Ingots to Copper Plates.
Just Bazaar your Copper Ingots for 99,999,999 and then remove.
Now your Copper Ingots are at the bottom of your inventory, and can be selected much more easily for you 48 crafting attempts.
Same goes with Crafting your stack of 99 Bronze Nuggets into Bronze Ingots. You get the idea!
Hope this helps until an actual Item sort is implemented. For a complete reorginization, you still have to use you retainer for now. This process should be made easier with the additional retainers that will hopefully arrive in next week's version update.