yes,it works, a lot of people on the French forum seem to use that method with one of those" US adress-reshipping services ( Shipito seems to be considered the best/least expensive )
BUT it doesnt work out to be any cheaper at all.
The
only thing it does is enable you to purchase items that normally cant be shipped internationally .By "cant" I mean that the vendor simply doesnt want to because as of now at least there's no reason why it cant be done.
Living in Europe,I too run into this problem regularly .
SOME vendors manage to offer really good,cheap postage to Europe through some kind of service that appears to give them discounted bulk rates on the regular USPS shipping costs.But very few vendors bother to do that, theyre pretty rare .
A vendor who accepts to ship with USPS First Class intl is pretty much the cheapest option out there....
PS : the old "mark it as a gift" trick doesnt work with customs anymore

....
For ejuices the best option is to mark it as a 20$ value and contents as "vegetal Glycerin"

.This is what some vendors do though I never ASK.
The basic rule is that reasonably sized packages sent through regular USPS (except their new Global Express service) Priority or First Class Intl mail hardly ever gets "stopped" at customs.
Fedex,DHL UPS and ALL courier Express services systematically bring all their parcels directly TO customs (!) and so you will get charged 100% of the time : on delivery your postman will request you pay= Vat on products, vat on shipping fees + extra 20-25 $ BS "processing fee" charged by the courier co.!
Depressing

.....