Another rich source for product ideas are online consumer marketplaces. Million of products is probably an understatement so you may want to begin your search with some of the popular and trending items and branch out into other interesting categories that catch your eye from there:
Amazon – Amazon is the largest internet retailer.
Amazon Bestsellers – Amazon’s most popular products based on sales. Updated hourly.
Amazon Movers and Shakers – Amazon’s biggest gainers in sales rank over the past 24 hours. Updated hourly.
Etsy – Etsy is a marketplace for handmade items.
Etsy Trending Items – Check out the current trending items and listings on Etsy.