This assertion is often put forth by naive Libertarian types, but it's simply not true. Cartels routinely emerge in markets with high barriers to entry. This happens even if there are laws against direct coordination and those laws are obeyed.

The market players aren't dumb, and they realize that if the barrier to entry is high enough, they can maximize profits by simply not competing. Price wars are terrible things for companies in such situations.

That said, there's no point in discussing history (such as turbine pricing) with you, because you've already demonstrated that you're a completely typical closed-minded religious zealot with an aversion to reality.