I opened the second chest in the 'Chests' menu and got 3 "8,791" cards. But when I went back to the main game window I only had just over 19,000 skullies. It should be at least 25,000. Sorry I don't have a calculator right by me.
Apparently when you click some of the buy buttons they turn yellow and become unclickable quite a bit. The only way around this I found is to buy something else in the same tab.
 "Clicker Fred"){kind=icon}
 "Scream Collector"){kind=icon}
 "The Perfect Tower"){kind=icon}