I suppose these question are just as pertinent if buying from China, EU, or other countries with delivery to US address. I am interested in the Panny 12-35/2.8, but can't find it domestically. There are sellers in Japan and Taiwan at eBay. If I buy from them, will I be at significant risk for additional customs charges? Is delivery reasonably fast? And I assume there would be no warranty protection, which makes me less enthusiastic. Is this correct?