Basically you can only use the price as orientation of how many games were made, for the AES its especially easy to assume it. According to the german Maniac magazine which i have an issue, it states that except for the launch tiles and every KoF game (tough i think 2003&2002 are exceptions) no Neo Geo AES game was produced over 10 thousand times.
http://www.kultboy.com/index.php?site=t&id=156
And this issue of an old german magazine says that Viewpoint was very less produced because of a Beef between Sammy and SNK. Both leading arcade companies at the time and still today and makes sense Viewpoint is the only early neo geo AES game that is expensive.
It says that 4000 copies of this game were mvs, 3000 were japanese aes and 1000 were american aes. But i think 4000 MVS copies overall is a mistake by them because viewpoint on the MVS is much cheaper than japanese AES copies so i think these 4000 are euro/american MVS copies.
So if you look at AES prices you can say everything what costs you 300€ is produced at least 3000 times because 300€ is at least what viewpoint JAP is going for. Everything above goes to 1000 or less, and everything under 100€ was produced over 10 thousand times, yes you can still find JAP KoF 0/01 for that price if seller is not asshole