Freebooksy
https://www.freebooksy.com/freebooksy-feature-pricing
5% Discount for new author with code PAIDAUTHOR-5
Only available once per customer
As a site dedicated exclusively to free books, Freebooksy has developed a sensational reputation among both self and traditionally published authors.
Their pricing for standard books ranges from $40 for smaller categories with perhaps 30,000 subscribers (such as Children’s Books) up to $100 for their biggest categories (Mystery/Thriller/Romance etc.).
They also have a very large Facebook page, with over a quarter of a million fans, and any promotion you do with Freebooksy will get shared on their Facebook page as well as with the subscribers of that genre.
Though they approve most submissions, they’re well-known enough with authors that you often have to book at least a week ahead to be sure of getting the date you want, and sometimes even longer than that if you’re looking to promote a book in one of the larger categories.