Very basic, perhaps dumb, question about realtor commissions.

[Jeff NA]

Completely out of curiosity, and at the risk of sounding very dumb, can anyone tell me what the commissions are on selling (or acting as a buyer's agent for) multi million dollar properties? Just wasting time sitting at my desk, I looked at a $4.5M parcel and was wondering if an agent still gets a typical 3% on something like that, or if that is negotiated down.