Good day!

Your economy is calculated perfectly.
Some might say I'm overprecise, and go with the flow, but I couldn't pass by this problem to report to you.
People are exploiting the market in Lovecraftian ways, as described here:
https://mods.factorio.com/mod/Transport_Drones/discussion/63f4c341e230318089b4ccb0

I hope my report will be filed soon, and as usual I should remain nameless, like "someone wishes you well".

For the secret Roman Empire,
Hail to Zod.

Agent 234

On the other tentacle, when I've deactivated the Transport Drones mod, the high-priced items has no recipes at all.

So it must be something with recipe detection in the crafter-buildings of other mods.
You can fin planty of them in 248k or Bio Industries.

If I can be any assistance, reply.

As a temporary fix, I've multiplied the prices of unknown and basic resources - that lessened the gap between products a bit.

For testing purposes to you, I use these mods now: https://mods.factorio.com/mod/kras_W2
Crushed stone from BioIndustries, Processed Fuel (red blob with black ends), most 248k components recipes is not found by your mod.
If you want to get quick results activate Shift+B for creative world.