This is a great idea and one if its not in a bric, could be implanted into Blocs - @Norm - maybe this could be something to bring into Blocs?
I remember using another platform and they had the same type of things.
So if I did this in Blocs it would work like:
Open the Global Bric which could be like a DIV, and place the bric i want inside.
I edit the bric, and as @simonclay has said, do a price list, maybe a latest offers list
That first one would have a unique ID I would give it like: Clearance
I would then duplicate this throughout the website and the bric with the same ID would change on each page.
On my old website a few years ago I would have equipment say for example a speaker I would hire out, If this speaker needed replacing with an image of a new one and text as we no longer had the old one, i would change it on one page and all the pages that had the image of that speaker in would change - it was great and so so simple.
Taking this method further - is this something maybe Jannis @InStacks could bring into Volt? - would be so simple for the client to change then.
Isn’t the structure already in place with headers and footers in their global areas? - so this should be made possible to bring in other areas…I hope !