I paid $405 out of JFK for 3 extra bags. That was just for excess bags. Extra bags and excess weight would have been more. They didn't weigh the bags, just gave us a slip with 3 written in the excess bag column, we bought it over to the ticket agent and paid.

Just found the email reply from Emirates for their US policy


NOTE:-

Bags weighing between 23kgs-32kgs (50lbs-70lbs) will be subject to an overweight fee of USD50 per bag/piece. The maximum weight of any bag/piece may not exceed 32kgs (70lbs) even when paying overweight fees.

USD135/- will be charged for any additional bag/piece checked-in up to 23kgs (50lbs). An additional weight on the extra piece will be charged as per above rates also.