I apologize to anyone following along that this project isn't going to move more quickly - I'm pretty busy, and I'm still mostly collecting thoughts, in spite of having thought about it for years.
So this one is obvious, but I'm going to put my thoughts down here.
Here's a pretty obvious observation: This is the price of spells, according to 5.24 PHB:
Spell | Service | Scribe |
L0 | 30 | 15 |
L1 | 50 | 25 |
L2 | 200 | 100 |
L3 | 300 | 150 |
L4 | 2000 | 1000 |
L5 | 2000 | 1500 |
L6 | 20000 | 10000 |
L7 | 20000 | 12500 |
L8 | 20000 | 15000 |
L9 | 100K | 50000 |
It seems pretty obvious to me that they rounded off the price of "Spellcasting Services" to save space, right? Otherwise, "Service" (the price of having a spell cast) should always equate to twice the cost of Scribing a Scroll (with Calligraphy Tools).