Etsy is a great place to find popular products that customers WANT! Many of them are uniquely suited for ETSY but there are also those that are great for selling on other marketplaces such as Amazon. This can help those who are creating Amazon bundles and also private label products.
Do not plagiarize or steal-simply be inspired!
Etsy Bestsellers List: https://www.etsy.com/market/best_selling_items
Craft Count: Top 10 lists of products and stores. https://www.craftcount.com/
Handmade Hunt: Top products and stores lists. https://www.handmadehunt.com/handmade
eRank: Tools designed for ETSY sellers but the free part is very useful to Amazon sellers. https://erank.com
Data Scrapers for specifics: https://mydataprovider.com/sites/etsy/
Helpful Videos For Amazon Sellers