It´s all in the order book, https://docs.google.com/spreadsheet/ccc?key=0AqgZtLSqKPzQdFFqNzNST2MzQUtQWTVzVTVsS3k3VVE&usp=sharing

You pay UK VAT of 20 % on the value of your USB-stick. So that is approx 1$ or 0.007 BTC on 5$ value. Not so much, because it is only USB sticks ;-)