I was wondering if this is perhaps partly a casualty of the demonetization of all the modern GB postage, especially the Machins. I mean if someone is sitting on top of tens of thousands of dollars in face value postage that overnight will have zero intrinsic value, it is a difficult decision to stay in business with all that stock. The classics and varieties will continue to hold their value but the "2x face" baseline for catalog value may no longer have any meaning. A sheet of stamps with £5 face value will always hold a minimum value around £5 if it can still be used as postage, but once demonetized, who's to say the catalog value or retail value won't drop to £1 because they are so common.
I don't know the GB market, but from a US perspective where modern postage in bulk typically sells at a good discount from face value, if the US Government offered to buy my entire stock at face value (in trade for Forever stamps whose value will continue to increase with inflation) I would jump on the opportunity.
Sorry to see that happen. Whatever the reason for his retirement, it is sad to see a dealer hang up his hat. It is hard for a modern collector to find a source to fill the missing spaces, there are very few dealers that have a good or specialized stock of modern material.
https://goscf.com/t/79986&whichpage=1#726160https://www.royalmail.com/sending/b...RCODEDSTAMPS