I got slapped with a hefty charge a few weeks ago just because some HN'er sent me a usb stick in the mail (insured). Beware!
Tax for just a USB stick sent by a friend? Ouch. I'm curious , what was the origin/destination of the package?
Origin USA, destination Netherlands.
I don't know about Netherlands, but in Spain you can contest any customs tax. They send you a printed form to fill if you want to contest it in the same envelope where they send you the invoice for the tax. Things can't be very different there.
On a sidenote, the seller I linked to is flexible about what price they stick on your package. You don't want to overdo it though, otherwise you might end up paying even more tax than normal.