Hello,
I'm looking for a case study about international pricing strategy of
any international firm. The purpose of this case study is to show why
the same product has a different prices in different countries. I need
a very specific example of existing company (like Gillette, Levis,
McDonald, Gucci etc.)

Appreciate your help.

Dear Witch, 
An interesting related issue is international pricing policy as
reflected in the "Big Mac Index", published by the "Economist" each
year, examining and comparing the price of a Big Mac in each country.
You can read it (and about it) in the Economist:
http://www.economist.com/markets/Bigmac/Index.cfm

Hi,Thanks for your comment...Do you have some other examples? I have
too many people who making the assigment on McDonald, so I need to
find something else...

Appreciate your help.