I think he means, how the business is run (like where the source of the bags is). My guess is he's an online consignment business, where people sell their bags to him and he turns them around for profit.
From what I understand, they are a Consignment Shop. Whatever is not sold right away in-store, is placed first in their online store and then from there it goes to eBay.
I always thought that he acted as a consignment shop, people take bags they want to sell, he sells it for them, he puts a price on it, and he gets part of the profit?
I think the ones to inquire about are the ones that are limited or a really high value. Maybe he gauges people's responses and entertains different offers, but couldn't tell you for sure.
