Compared to other business ideas, yes it is easy but it's not 'push-button' as many experts would have you believe (as they pitch you their $5,000+ training/services to help you). Selling products on Amazon is a business and the more you treat it like 'your baby', the much higher chance you will have with success.

Also buying products in bulk and rebranding them (this is called 'private label' or 'white label') is just one of 25+ ways to get products to resell on Amazon.

For more free information than you'll ever need to get started, check out my resources page at: http://jordanmalik.com/blog/resources (especially near the top under 'Amazon - Free Beginner Help'. Also (if you're interested in a high-quality, low price course to help you along), check out my free review guides/comparison charts of the world's best Amazon seller training at: http://jordanmalik.com/blog/asm and http://CourseComparo.com .... Good luck!