What should be the price of my e-book?

I've created an eBook on "11 Winning Email Templates For Your Newly Launched SaaS" in which I crafted email templates for different product & marketing strategies including beta test invitation, affiliate program invitation, LTD Promotion, etc. Plus, a bonus guide to ensure top deliverability for outreach emails. >> It aims to help solo founders (& non-marketing guys) in email marketing campaigns. So, What should be the price of my e-book? Please comment...