Amazon and other marketplaces - Product Sourcing and VA

- Product Sourcing: Find a competitors products manufacturer source using some third party tools, analyze product ROI on Amazon and other marketplaces
- Marketplace VA - nice to have experience from this areas but not mandatory: research and update listings, description, photos, track inventory, keyword research, listing SEO optimization, advertise, PPC, FB ads, AdWords. Let me know which of this areas you can cover.