The price guide on Neo Geo isn't actually like...used by anyone. Also, it's about eight years out of date and maintained by an a$$hole that charges way more for the stuff he sells than what the guide says. It's a mess.
If you just want a list, go to pcedaisakusen.net. Everything, all regions is listed here and you can sort by format.
There has been a lot talk about price guides here and most non-noobs think they are a terrible idea, and for all sorts of reasons. The main problem is that they stagnate, or are used to drive up prices.
If you want a game, play it or watch a video of it on YouTube. Decide how much it looks like its worth and buy it when you can get it for that price. Don't buy Bomberman 93 for $100 just because some shithead tells you that's what it's worth.