Problem
You need a list of all Vendor IDs from your account.
Solution
Obtain a list of all Vendor IDs in my account
Follow these steps to get your Vendor ID list from your account.
Click on the Pricebook icon.
In the left side menu, click on Import / Export.
Click on the Export tab.
In the Export Type dropdown, select Vendor Material Cost Export
Click Export.
Once complete, an excel file will download to your computer. The first column is a list of Vendor Id's