How much does Coinbase vault cost?

I'm curious to know about the pricing structure of Coinbase Vault. Can you provide me with a breakdown of the costs associated with using this service? Are there any upfront fees or ongoing charges that I should be aware of? Additionally, does the cost vary depending on the amount of cryptocurrency being stored or the duration of use? I'm eager to understand the full financial implications of utilizing Coinbase Vault for my cryptocurrency holdings.