I think a lot of us have been mostly concentrating on Electronics that are easily caught by customs:

Here are a few more things that dont fall into the bucket:

from http://www.techetron.com/11310/backpack-a-new-startup-in-tow...

Ever dreamed owning an original Bob Dylan autographed poster which you see auctioned at eBay? Ever gasped why eBay or Amazon products don’t get shipped to your country? Ever wondered how cool it would have been if you could hold first edition Harry Potter books right after they got published? What about having original jersey of your most favorite superstar?