If you're in Australia, Melbourne Pen Depot in Chadstone is doing their annual sale - this year only at 10% off, while previous years were 15% off. I have checked Taft, and other retailers - they don't discount Montblanc...
My belief is that dealers in US are not allowed to mail order or sell their pens overseas for current production models. However, it doesn't exclude you to get a feel on their discounts. e.g.
www.fountainpenhospital.com. They'll email you their prices.