Usually, you'll have to pay imort taxes and such...
But if you're going for USA Jacksons, USA BCRich and other stuff, it's cheaper to buy it and pay import duties, than to order from a local dealer.
Import duties and value-added-taxes seem to total from 15-25% the cost of the item.
You should be able to save 15-20% or more off what a European dealer sells their stock for.
I've got friends in Germany, England and Austrialia, and they save lots of money doing it this way.