Selling coaching package via email

I often have clients emailing me asking what the cost of my coaching package is. And so far, I’ve been emailing them back with the price and list of what’s included in the package e.g. X many live 1:1 calls, Slack support, etc.

But I just heard in an Entrepreneur course where Brooke talks about selling the solution/destination vs. the tactics (the calls, the webinars, the ebooks, etc) which is the exact opposite of what I’ve been doing up until this point.

I’m wondering if it’s a big “no no” to share what the cost of my package is via email. Or is this OK as long as I also highlight the solution/destination that I’m offering them as well?