Have I Been Pwned (HIPB) has been pulled off the market. Troy Hunt announced last year he was looking to sell the free service to check if your usernames and passwords have been compromised in a data breach. Hunt said in June 2019 he was listing the service for sale. However after a strenuous M&A process resulting in an infeasible deal with an exclusive bidder, Hunt said that he will instead continue to run the service independently.
Source: https://threatpost.com/have-i-been-pwned-no-longer-for-sale/153401/