I just bought 10. I was starting to run low, but I didn't want to buy a whole bunch right before the sale.
Another Master ball! With that discount, now is the moment to get one. I'm debating buying regular balls and/or a third Master ball…
Just bought 100 more after a Ditto consumed my last 10...gotta make these last. At least until I get 200 more PP. xD
Another 100 for me, since I ran out earlier today and I hit 400PP...that's my comfort zone, I think. Just in case I ever need another Master Ball short notice for a limited Legendary run or something. xD