Subject: Re: NAR settles realtor lawsuit
but I've seen a good number of the 4 million $ houses go with a 6% commission.

Ouch.

I did a calculation once on a property I wanted to sell and concluded it would be cheaper to buy a local brokerage than to pay the commission they were asking which they said was "normal" but nobody smart actually pays.
(I didn't do so, but I did get a commission rate far lower than what they said was their lowest!).
Not in the US though.

With one broker I negotiated "low minimum flat fee, plus 20% of sale price above XXX".

Jim