No it's not difficult to understand, but you have set a precedent with the 8700K. If you want to tell us that this will never happen again - go ahead.
Also I assume that you put all the OEM (and retail in this case) processors through the same delidding and test methodology? If this is the case then why charge more for the higher clocks if the extra work amounts to same for each?
The higher price for the higher binned processor reflects the lower price for the lower binned processor - the whole binning and delidding activity breaks even at a price point that's somewhere in the middle. You can't view the activity as economizing per-processor, it economizes over the course of selling the entire batch.
The amount of work should be viewed as the amount of work required to bin and delid all 30 processors, not each one individually. The supplier cares about the average price per piece in the batch. If they were all to be sold based on the 'cost of process' like you're suggesting, the cost for each would rest somewhere in the middle of all the price points of the delidded and binned processors being sold. But in that case, there'd be no way to distinguish a 5.0Ghz binned processor from a 5.2Ghz binned processor at the point of sale for the consumer, and it just becomes a lottery again, and the entire process of binning loses its purpose. That's a system that only the sort of person who can't understand why someone would pay more for a higher guaranteed stable OC would implement.
I can't really understand why anyone has a problem with the binning and delidding. Boxed retail processors are never going back into the boxes - if you're buying a boxed retail processor, you're still getting your fair shot at the lottery -- once they become available. Thing about lotteries is that they tend not to favor the person playing them though. OcUK recieved, what, 30 chips in total? Of them, only a single one of the ******* binned at 5.2Ghz. Of course that thing is worth a ******* premium. You'd have to void the warranty on over £10,000 worth of processors just to find one of that capability yourself.
And guess what, with a chip of that quality, at that price - the demand exceeds supply. How do I know that? I know that because I'd have bought the chip at that price if I'd have been fast enough to order it, but someone else got there first. That's a 2:1 demand:supply ratio already, without even counting anyone else. If your hobby is building and overclocking systems because you find it enjoyable and fun, and you feel that paying a premium for the best parts available is of value to you in the sense that its more fun, then the binning and delidding service is invaluable.
If this service didn't exist, or was even more limited by stock issues, then anyone who is willing to pay more for a guaranteed stable OC with a value-added warranty gets shafted. There's a limited number of chips here and the demand far exceeds supply. That's not OcUK's fault, is it? People, maybe not you, but other people, are willing to pay hand over fist to get their chips first and get them with the knowledge of what they're capable of. Why would it make sense for anyone to sell something to someone who is only willing to pay half as much as a group of people who are queued up and ready to buy it too?
The price of the processor, here, is being determined by the huge demand of people who are willing to pay upwards of £700 for it.
If you're only willing to pay £350 for it, then you're essentially telling OcUK that you hate them because you believe they owe you a 50% discount on something that someone else wants to pay full price for.
That doesn't make any sense at all. Its certainly not fair, its just your sense of entitlement determining that you're somehow owed something for less than its worth.