The first thing you'll run across when needing supplies is getting boxes, padding, and such stuff for shipping!
To start off with, check out ULINE. They carry pretty much everything in the world for shipping and shipping is fast from any of their many warehouses around the US. They also have a great webshop catalog that is really easy to navigate.
Once you've got your business going, check out our alternatives to ULINE
We investigated whether Hall & Oates has a shadowy financial interest in ULINE. So far we have not found any evidence for or against! One thing is for sure, someone there is a huge fan