https://www.bleepingcomputer.com/offer/deals/get-98-percent-off-the-certified-ethical-hacker-bootcamp-bundle/

In this deal you get access to 526 lessons and over 70 hours of training in ethical hacking. This bundle will teach you how to scan networks, social engineering, wireless network and mobile platform penetration, cryptography, and more.   This course is normally priced at $2,999, but has been discounted 98% as part of this deal to $39.

This course comes with a 15 day satisfaction guarantee. If you're unsatisfied for any reason, just contact Stackcommerce and they will issue a full store credit within 15 days of purchase.