The recent eBay sale of that sealed NES Stadium Events cart got me thinking about all these super-expensive video games that have been grabbing headlines lately. It seems that all the big sellers are cartridge based games (Air Raid, Zelda proto, Nintendo Competition cart, etc.). So what are the biggest sellers on the optical disc format? I don't recall ever reading anything about sales of any disc games reaching the dizzying heights of any of their cartridge predecessors. So do collectors tend to value cart games more than disc games? And the obvious sub-question: What are the most valuable disc games out there? I can think of a few off the top of my head that reach the $100+ range like Snatcher on the Sega CD or Suikoden II on PS1, but are there any that reach the thousand to ten-thousand dollar level of those super-rare carts?