A few Electronics products I can recommend:

Electronic Repair Information
How You Can Test Electronic Components Like A Professional!High conversion rate 3-4%.
Electronic Repair Information

Introduction To Basic Electronics Hands-On Mini Course
Learning basic electronics is a hot niche market. People looking for work want to improve their chances of getting a higher paying job by learning basic electronics and students taking electronics can use this home study course to improve their grades.
Introduction To Basic Electronics Hands-On Mini Course