Earlier quoted context omitted.
You are ostensibly correct but basically incorrect. If you sell a product on Walmart and Amazon, Amazon forces you to sell it at the same price or they will not offer it immediately for sale. They change the page to make it look entirely out of stock.
More like "if you sell a product that they already have because it's from the same distributor and is the exact same product". Well then what do you bring to the table for their consumers and why on earth would they pay more for yours. Don't like it? Try ebay.
"More like"? That is a completely different scenario.