A conservative estimate puts the value of the entire Neo Geo library of games - all European, US and Japanese variants - at around a quarter of a million dollars. Some of the games are so scarce that they come up for sale only once a decade. In October 2009, for example, an anonymous buyer paid $55,045.64 for the European versions of the fighting game Kizuna Encounter and the football game Ultimate 11 (as if guided by a scriptwriter's pen, the buyer carried a custom-made briefcase to meet the seller, to ensure the games remained pristinely cosy on the flight home). There are, it is estimated, fewer than ten copies of each game in existence. Even for the wealthiest game fanatic, then, there is almost no opportunity to play these games anywhere outside of a PC emulator.