I was there earlier today and overheard one of the employees talking about MK. He said they had five of them when they opened up and they lasted about a half hour so I'm guessing you were there at open? I've already got a MK but it would have been great trade bait for one of the other figures I'm looking for for my son.
Great find on the Marth too.
I actually got it yesterday around, 5pm or 6pm. I went there to pick up Splatoon and the had 2 hanging there lol.