[Someone]

”Even if the two participants in the market never communicate”

But you can’t get at identical prices without communication between parties. Without communication, initial price setting is as if both companies make a bid in a sealed envelope.

It would be highly unlikely that both bids would be identical, and the lowest bidder with a price above $12.53 makes all the profit.

[saint_fiasco]

The two participants didn't appear at the same time. When the first participant appeared and set the original price, that price became an obvious Schelling point.