How much do legendary cards cost in shop Clash Royale?

Could you please elaborate on the pricing of legendary cards in the Clash Royale shop? I'm curious to know if there's a fixed cost or if it varies based on certain factors. Also, do these cards tend to be more expensive compared to other types of cards, and if so, why? I'm wondering if the rarity and power of these legendary cards justify their higher price tags. Additionally, are there any special offers or discounts available for players looking to purchase legendary cards? Your insights into this topic would be greatly appreciated.