From the article: "PNW wasn’t the only business growing tired of Amazon. Kerson and his team asked buyers at every retailer who stocks PNW parts to remove them from their Amazon stores too, so that everyone involved could maximize their profits and not undercut each other." ... “We set up these calls and we were not expecting them to go very well,” says Marshall, “As soon as we started talking about it the buyers were really excited.”

From the FTC: "Price fixing is an agreement (written, verbal, or inferred from conduct) among competitors that raises, lowers, or stabilizes prices or competitive terms ... Price fixing relates not only to prices, but also to other terms that affect prices to consumers, such as shipping fees, warranties, discount programs, or financing rates. Antitrust scrutiny may occur when competitors discuss the following topics: ..., Capacity, Identity of customers, ... Defendants may not justify their behavior by arguing that the prices were reasonable to consumers, were necessary to avoid cut-throat competition, or stimulated competition." [1]

Is there a lawer who can say if that was price fixing?

[1] https://www.ftc.gov/tips-advice/competition-guidance/guide-a...