I assume that the bidders took the starting price of £280 to be reasonable, so that £50 over is therefore not excessive. If it had started at £180 and gone up to £230 there would be nothing to explain as it would be close to Spink book. Yes, you're right Rob - I hadn't checked the Spink price. Guess I just think of these as readily available in high grades, let's see where it ends up! - if close to £400 that is excessive as far as I'm concerned, and would suggest someone paying for the number? CCGB 2014 price is £150 in BU.So the bidders are buying the slab and its grade.MADNESS.