Product Research

 https://avada.io/resources/product-research-for-shopify.html

Comprehensive guide on how to do Shopify Product Research:

https://deliverr.com/blog/shopify-product-research/

3PL Logistics

Facebook ad library

Adspy 

Ecomhunt 

Viral ecom adz 

BigSpy 

Crypto cash

 http://copymycrypto.com/

https://www.angellist.com/

Buy sell websites

https://quietlight.com/

https://flippa.com/

https://coinmarketcap.com/

https://www.nerdwallet.com/