By the way, calmvoice, I have heard of le guide sante before, and the site looks a bit strange, but that's partly because it's a French company operating a UK site, and some of the language is translated a bit strangely. I can't vouch for whether they are a responsible site or not to order from, but on the whole it looks probably-legitimate. They don't explain their shipping costs anywhere that I can see on the site, but they do mention that outside-of-European-Union orders will be subject to customs and taxes by the recipient's country. I would imagine that you could probably buy it from that site and get it shipped to you for about $30 total, unless their hidden shipping rates are terribly inflated.
However, it would be cheaper to buy it from the US-based site that Ronin found, for $17.00. They don't mention what their shipping charges from their headquarters in Washington DC are on a $17 product, but probably shipping and handling is in the $7 range -- and apparently their shipping is free for orders over $35. This is the site that Ronin found which sells it in the US: http://www.frenchcosmeticsforless.com/proddetail.php?prod=13035