Indeed, the world has truly changed.
Before Baymard, calligraphy and writing brushes were priced at 20 Silver coins per brush ( that's 20,000 CCs).
But now... heh.
In Pyno, a single ordinary brush cost 10 copper coins.
Now, these merchants who sell brushes, also stock up on Baymardian books, pens and whatnot, selling all writing materials too.
The one thing one has to appreciate about Baymard was that it still held Calligraphy very important, by hosting Calligraphy competitions and ensuring the tradition of Calligraphy writing continued.
So you could say that at first, the prices dropped tremendously.
But after a while, they slowly started picking up again, with people heading for auction houses to purchase incredible brush sets at a whopping 1000 silver coin price sometimes.
What Baymard did was to normalize the use of calligraphy brushes, by having Calligraphy taught in schools as a mandatory course.