The modify your hypothetical so it fits the Apple facts:
Hasbro then threatens to withdraw all GI Joes from Kmart. KMart can no longer sell any GI Joes--even if acquired from third party resellers. Walmart knows this, and indeed suggested this negotiation strategy to Hasbro.
Of course, this has happened before. This is why the MSRP is now only a "suggested" price and why a retailer is free to sell at whatever price it chooses, however such price affects its own margins.
Hasbro then threatens to withdraw all GI Joes from Kmart. KMart can no longer sell any GI Joes--even if acquired from third party resellers. Walmart knows this, and indeed suggested this negotiation strategy to Hasbro.
Of course, this has happened before. This is why the MSRP is now only a "suggested" price and why a retailer is free to sell at whatever price it chooses, however such price affects its own margins.