Re: "mainly from Chinese websites"
Not to say that many "UK sellers" in Amazon, eBay and NewEgg are simply fronts for Chinese sellers (read: repackagers of used or stolen electronics as new, or peddlers of counterfeit chips). Some of them will even list addresses of UK shipping warehouses or invalid addresses (most people won't check). Not to say that a valid UK address means valid sellers, the front is much better camouflaged.
Biting the hand that feeds IT
