I did not experience it myself, but it seems that it is still cheaper than ordering from shops in France (when the juice is not out of stock).
One reason is because, by ordering big quantities, shipping fee is free within US. So, you "only" have to pay the handling fee and shipping fee from the forwarder to your destination; and if you are not in a hurry and lucky with customs, you may not pay more than 30 to 40 bucks in total for delivery costs.
I believe it can be an option.
Actually I am currently investigating this option for delivery to Japan.