Rhea made some excellent points. To add, Amazon allows some dropshipping and frowns upon others (Link hidden: Login to view
). You'll want to keep this in mind, as you start your journey.
Primarily for our international Resellers, EnRoute Global started a process probably back in 2015, where we ship directly to Amazon FBA on behalf of our Resellers (only from a couple of our warehouses). This is beneficial where our international Resellers have selected the products they want; however, do not have to engage a pack and prep company to deliver to Amazon warehouses.
Additionally, if you are looking for products to sell on Amazon, message me and we can discuss your operating model, purchasing criteria, sale history and trending expectations, etc.
All the best to you!