What is the mos expensive cheese i could find in Paris France?

The question is relatively meaningless since even the most expensive commonly available cheeses are not significantly more expensive in absolute terms than the least expensive. There are always some oddities about that are relatively more expensive simply because of their novelty value but picking cheese (or anything) by cost is simply a waste of time and money. There is a rather nice cheese shop with an excellant selection on the rue St. Jacques just south of the rue Souflot which you might try. (There's a wineshop one door down that should be your second stop on your shopping trip). But please, don't go around asking for "the most expensive cheese" as everyone will immediately (and quite properly) take your request as vulgar and ignorant.

ANY.....most Countries out-side of Paris tend to make BETTER Cheeses and Quite simply , the French Import it and tell YOU , you have to PAY for it , just because it is in Paris!