LMAO wish I knew this before I did it. I had put FF as the value and went into the store and only saw 9 coins, but then couldn't move to buy anything. I just kept changing it to 9 coins and bought what I could and reset back to 9 coins until everything was purchased LOLMax coins you can get are 60 (3C). All over 60 will put you in a max_coin_check loop. Put in 60 coins as max to leave this loop and continue the game.