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How much more costly are we talking, on average?
Brushless is discussed often in the RC community, with the same benefits/drawbacks mentioned.
Yesterday I received a brushless RC helicopter and I heard that the brushed version is $5 cheaper.
I'd be willing to pay more upfront for something that will never need maintenance and be a little more efficient. The starter motor for the ATV is always needing new brushes, which is an additional cost in both materials and time.
As a tangent thought, rare earth permanent magnet motors are more efficient than induction (though I don't know by how much). Tesla uses induction, while many other EVs use permanent magnet. Of course, permanent magnet is more costly.
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