Sure. :) I'm never going to use it, anyways. Right now, I need Stealth Rock more than the Master Ball. :pYou sure you are willing to give up Master Ball just for it? If not then you can have it for free. I've added you and can trade now.
It's a 5 IV Impish Skarmory but with Keen Eye
Edit: I'm online now.
Edit 2: Thank you very much! :D