That price obviously comes from the level of rarity of the coin, it has a lot of value at the collector level because it is a piece that has a higher historical value than normal. Still, it's not for the average collector, but for eccentric super-rich who can spend ridiculous amounts of money for so few grams of silver (obviously, it's not paying for the weight value of the silver, but for the historical significance of the piece, as we already know).