EDIT: sweet Jesus. Just checked the current state on Amazon and the 400s are listed at £117 for just the base unit, more than the £91 I paid for the full kit (the only in-stock option at the time) six months ago, the 4Gb 4 is £173 (next day prime) or £155 (up to two week delivery), and the 8Gb is down for a whopping £290! (next day, no cheaper slower options). The only Pi3 showing as in-stock ATM is £100. Maybe I should hunt out my spare 3 and make some drinking money from it!
I've not checked other sources.
The other a bit less common one is only few months tho, compared to year+ so I guess it slowly is. Inflation probably helped too
Small end-users receiving chips is a lagging indicator of the state of the supply chain. Companies are already warning about surplus inventory, ie:
https://moneyweek.com/economy/global-economy/605232/semicond...
Hopefully we'll turn the corner soon and availability of most IC's will get back to normal. fingers crossed