To find advisors and their cost per minute, you go to the "Psychics" tab. There you can find advisor you prefer, using different filter and categories. Please refer to this guide about finding the right advisor: How can I choose the right astrologer on Nebula?
You can see the price that you will pay for a minute of communication with the advisors at the bottom of their photo. Also, the price will be visible on the advisor's profile page, where you can find information about a certain astrologer and in the chat at the bottom.
Each astrologer has the own "Credits per minute" cost, depending on their experience and quality. But be sure that all our astrologers are professionals and all of them has certificates or other documents confirming their expertise.
Please also follow this guide that will help you find the right astrologer: How can i choose the right astrologer on Nebula?
Additionally, please see full AskNebula.com guide here: AskNebula tutorial