If I had to give an example of the difference between price-fixing and expedited price discovery, I'd say software used by vendors with significant market power

If I had to give an example of the difference between price-fixing and expedited price discovery, I'd say software used by vendors with significant market power that not only suggests a price based on other clients' prices, but actually sets it and bills based on it, whilst actively resisting clients trying to bill lower amounts would be a pretty good example of when it becomes fixing (the fact it's apparently documented in training programmes with cheesy computer voices saying, in essence "think of the long term benefits of the cartel, not your tenants or vacancy rate" and implemented by demanding clients seek "approval" for their own prices and not just through poor UX is the icing on the cake)