You've done a similar analysis to me and concluded "it depends". One issue affecting inheritance may be the high levels of personal debt. A lot of that inherited case may go to paying down existing debts. That said it could free up some monthly income to spend on discretionary items.
Glad I got that Titanium PSU for £135. Nice OCUK deal
Speak of the devil
To be fair the situation has a lot of moving parts. My take is due to our Brexit preparations, financial prudence ie so called "austerity" and mostly sensible population we will fair better than most.
In the short term higher prices due to constrained supply. Medium to long term I think we'll get better pricing. PC components are quite niche, the buyers usually find the money, look how OCUK has thrived.