They were attempting to sell it for 15 times that
The gates were critical to the story of the RTR block, which focused on Jace Beleren as he tried to solve the mystery of the Implicit Maze, a construct of leylines weaving through Ravnica touching each of the 10 guildgates
Most booster boxes are tough to find these days under $80 so if you can find them on eBay, its definitely one of the cheaper options
If the numerator exceeds the denominator, the card is a secret rare of some kind SR, SAR, UR, or MUR
Additionally, any Monster that battles your chosen Blue-Eyes Monster is destroyed at the end of the Damage Step
5D's episode 126: "When Nordic Gods Attack" Yu-Gi-Oh