There seem to be some recent Airfix releases which are already getting hard to procure at a decent price.
The 1/24th Mosquito and Typhoon and even the Hellcat, are advertised at vastly inflated prices on well known auction sites ,and other older kits such as the 1/72nd Nimrod for example, also seem in short supply.
I’m not necessarily looking for those kits myself, but would have thought it made commercial sense to undertake a limited production run for kits which are clearly in short supply, and increasingly difficult to get hold of, especially brand new.