I actually think what
@Gibbo is saying is spot on... Would they rather risk selling low and being unable to fulfil orders and then gain a bad rep as an unreliable supplier (****** for instance is the very essence of this, bunch of scam artists). Or sell them higher so only those that are happy to drop that amount of cash are biting, the type of people happy to wait for the premium product, and most likely to know what they are buying, why and for how much etc.
The fact you can get them from the US imported for cheaper is almost irrelevant to OCUK, some people will pay the premium with this site for them to handle the RMA issues etc, that kinda peace of mind is often invaluable to some people.
And like
@Gibbo says if you can get them in stock from the USA for cheaper go for it, i trust his judgement as this is the business he has been in for many years, over some armchair enthuisiasts who can google "cheapest 9900k price* and then make a buying decision off the back of that. And yeah Amazon has the biggest buying power in the world, so its understandable they can a) get hold of stock before other vendors and b) knock it out cheaper as their buy price is probably the lowest of any vendor.
End of the day, if your happy to chance your arm buying overseas and it works out cheaper go for it, you may have to wait, you may not, if not, if your happy to pay the UK prices do that instead..
Arguing constantly on forums about the price of the chips wont change the price of the chips, either pay up or shut up really, it is what it is, and it will probably get worse especially if there is delays into next year.
Blame Intel if you want to blame anyone, of course it looks outwardly like the UK vendors have consorted to artificially inflate the prices, that may well or may not have any truth or merit, only those vendors will know. But ultimately its Intel's screw up that has caused this situation, nobody else.
Oh and also AMD shouldnt be blamed at all in this, they have shown you can buy a competitive product at a reasonable price, only Intel with their arrogance believe a similiar product should be twice as much.