I think the price of a M3 in the US is the best in the world ... here in Canada we pay a higher inflated price ... then everything is more expensive in Canada.
In Germany I saw a M3 for over 100,000 Euro (some $132,000 US or $131,000 CDN). For taxes on a car purchased in Germany see attachment or Google
In some places like Australia, China etc the car prices and taxes are over the top.
If you need more info on German taxes check it on Google ---> Click here