In work, we were looking for some SATA to USB cables. We couldn't find any in the UK but we found a US website stocking them for around $30. Our printer engineer tried to buy 3 of them with his credit card (our Government Purchase scheme prevents us from buying from anywhere but the stockists on our official lists) but the retailer refused, stating that they could not supply these cables outside the "Continental US". He asked why not, "for security reasons" came the reply. They are shipping them to his brother in the US, who will post them on to him. The mind boggles.