Interesting question. I am collecting CGS graded coins and as far as I know they did not change their valuation by grade „across the board“. Generally speaking they monitor the prices achieved on the market and then adjust prices accordingly. On CGS forum meeting last year I have personally seen their impressive computer database were are the achieved prices added (as well as prices of raw coins). For example 1/2Crown 1836 valued by CGS in grade 80 at 1000,- pounds at that time sold in Lockdales sale 103 in May this year for £1580,- (double the estimate) and subsequently the CGS price on their website changed to 1600,-. In the same sale Ghotic Crown 1847 (in grade 78, valued at 3500,-) sold for £ 4200,- and is currently valued at 4000,- (interestingly in December sale this coin in grade 70 sold for £ 3900,-). I have noticed this as I have been bidding on this coins (unsuccessfully – needless to say). On the other hand I owe 6d 1879 No Die Number in grade 80 – the CGS valuation recently dropped from £ 300,- to 275,-. For me, however, still applies that value of my coins is what someone will be prepared to pay in the future. And I always buying the coins for the price I am happy with. Mike, as far as you are aware then CGS updates its valuations 'as and when', as opposed to annually or soon after the autumn auctions and the new Spink? The values of my CGS coins have not budged an inch in either direction so far, allbeit my CGS 'experiment' is not quite 1 year old yet! Do you know when the next CGS forum meeting is, I think Bill Pugsley told me it was due to be early 2014? Thanks for any info.