Hello ! I there any domain registrar which offers $3/domain/year for 100 domains .

As i said in your other thread, im affraid its not gonna happen.... ICANN themselfs will want $6 each

I agree, not even any of the reseller account would support that. The cheapest domains are with Yahoo and 1and1.

Buying domains in bulk will not help you get better pricing. It doesn't matter if you buy 10 million domains. You still will not get them for $3 each.

Anything less than $6.50 USD is pretty much a loss for any company. So if they are selling them lower than that then they are just selling it at a loss to try to sell other services to you.