The question remains though, who assigns the value? This is a conflict of interests because remuneration is tied to a value assigned by the recipient of your money. If slabbing has to be done, and I have no reason to deny them the right to offer a service, then it should be a flat fee service. The time taken to grade a £10 coin should be no more or less than that required to do a £10K coin - if the job is done properly. By all means charge higher shipping due to the insurance, but if you are paying more to have a high value coin graded it tells me that either someone is skimping somewhere or alternatively, someone is being ripped off for the time actually taken.