I bought a pipe from them earler this year, and I've purchased from them in the past. Good shop, good product, good service, no complaints.
Their pipes are listed for sale in euros, their shipping charges are in euros. Take the total of the purchase price plus shipping and convert it from euros to dollars (just type into google "convert X euros to dollars), then deduct 20% for the VAT deduction (a tax only EU countries have to pay, they deduct it for US sales). This will be roughly your actual price, there may be a small variance as the banks do a real time currency conversion at the time of sale. The shop is trustworthy, they wont mess you about to make an extra buck.
Shipping is a cost concern. If possible always ask them to ship via postal service rather than courier. I believe they offer both options unless the item is rather valuable. They usually only send the high dollar stuff via courier (Fedex, DHL) for their own protection. If sent via postal service it will take a week or so (at least it did to California) and it will almost always go through customs with no hiccups or import duties owed. If sent via courier the courier will charge you for customs fees plus an extra fee for brokering the parcel through customs.
If you are unsure just email them, tell them what item you want and how you want it shipped and ask the total cost in dollars, they will give you a straight answer.