Dark Leak Market and File Leaks marketplaces have been created to sell stolen data. Marketo and Marketo marketplaces exist solely to sell data to other threat actors or back to the victim themselves. The data sold at these marketplaces ranges from $100 to $9,000 and has been gathered from ransomware gang’s data leak sites and hacking forums. Victims should never pay a ransom for stolen data as there is no guarantee that their data will be deleted and not sold to other threats.
Source: https://www.bleepingcomputer.com/news/security/data-leak-marketplaces-aim-to-take-over-the-extortion-economy/