How much is the space ID?

Excuse me, as a cryptocurrency enthusiast and finance professional, I'm interested in learning more about the pricing of space IDs. Could you please elaborate on the factors that determine the cost of a space ID? Is it based solely on scarcity or does it also consider other metrics such as popularity, usage, or even the specific functionality the ID offers? I'm curious to know if there's a standard pricing mechanism or if it varies depending on the platform or service provider. Your insights would be greatly appreciated.