No card is worth anywhere near $100. Yu Gi Oh cards, Magic: The Gathering cards, Pokemon cards, WoW cards (etc) all sell not out of rarity (thought that is a factor) but out of how good they are. The major audience for trading cards nowadays are those who grew up with them, so the 90s generation. Since trading is only part of it, most of the collectors who traded when they were younger now play for sport, so getting better cards is more of a priority over rarity which is why they sell more.