In the example above you can see how a single product can be available from multiple distributors, you only need to create a listing for 1 of these SKUs and PSS will automatically pull in inventories from any other distributors that you have entered the appropriate credentials for. If you create listings for multiple SKUs for one product that is fine, PSS will detect it and prevent you from creating duplicate listings.
In regards to what SKUs price or inventory gets displayed on the listing, PSS will automatically determine the optimal SKU based of of available inventory and then fastest lead time.
What if I don't want to sell/source all of the brands through all of the distributors? No problem, this is where your Fulfillment Preferences will come in; it is done on a brand by brand basis. For example, you can tell PSS that you only want to fulfill NGK spark plugs through Western. Or that you want to first check Western and then go to Tucker.
To set up these Fulfillment Preferences go under the Settings tab in your dashboard to Fulfillment Preferences. Click New Preference to set one up. You will be prompted to add a Manufacturer, then assign a hierarchy of your preferred distributors.
In the example above the Manufacturer "FMF" is set to push pricing and inventory first for Tucker Rocky, then Parts Unlimited, then Western.
* If you only want a brand to fulfill from a single distributor you would just place one distributor in the preference.