Another thing to watch out for is if the seller doesn't provide a proper invoice INCLUDING THE SHIPPING in the shipping documentation. I had this last year on a spindle, and someone in customs calculated the VAT on what they thought the shipping ought to have been according to some random formula, rather than what it actually was. This resulted in me being charged something like £75 extra. Thankfully I'm VAT registered, so I promptly claimed it back, but it could have been expensive.