This is a quite relevant section as I did wonder what value encrypted passwords were
Most of the passwords are believed to be encrypted and hashed, meaning any buyer will have to crack the encryption to gain access to the accounts. However, because data breaches have become some common, a purchaser could cross-reference email addresses with previous breaches. If a person has reused a password, their account may be compromised. As a precaution, if you’ve used any of the affected services, it’s probably best to change your password.