Gravelface:
Absolutely agree with you, it is indeed going above and beyond to offer to pay for something that isn't at all your responsibility. The guy asking for Clone7 to do it is clearly being a bit of a jerk (or to be as charitable as possible a little on the naive/stupid side).
I do sometimes think though that, if one is dealing regularly particularly, it might (it might not-circumstances are always relevant too) be worth a small ('cos it's not been mentioned how much, and I've never found customs charges too ridiculous so I'm guessing based on that) loss to be that guy who goes the extra mile. Then making sure it's 100% clear what the situation is in future so nobady gets the chance to complain

.
Yeah it's a pain but, as I said, it's probably what I'd do (offer a portion of it)-just to make sure no one can possibly call me.
Clone7 totally shouldn't feel obligated to though, it IS the buyers responsibility (and, as mentioned by Mr Martin, the fact that it was mentioned as being sent as a "gift" suggests the guy knew that and is just being a dick now). I was just offering an alternative if he felt to be warrented.
I haven't got any links at the moment, it's been a few (2-3) sellers on Ebay who deal in large quanities (thousands of individual items) to the UK from the US; they also generally claim to never have had anything stopped (which, considering I've had one item meet an extra charge of the ones I've ordered from the US, I can just about believe).