Ok, I've suspected something, but this *has* to be a bug. I have the shrewd trader edge. I bartered a dragonorb, worth 25 gold, for an item that cost 1750 copper. I only received three of them. I tried to barter the dragonorb for at item worth 10000 copper, but Urasio said the deal wasn't worthwhile. I don't barter a lot, but I'm thinking something off with the math as items get higher priced.

Log below:

<876hp 100% 50% 24350tnl 2 AM wilderness> iYou are carrying:
(Glowing) the diamond dagger named 'Light of Redemption'
a single sheet of aged parchment
a stone baton
(Glowing) (Humming) a razor-thin dagger 'Storm Shear'
(Glowing) a dagger named 'frostbite'
a linen needlework
the girdle of endless space
the Cuendillar Dagger of the Empress
(Humming) a long titanium spear

<876hp 100% 50% 24350tnl 2 AM wilderness> get dragonorb girdleYou get the jade dragonorb from the girdle of endless space.

<876hp 100% 56% 24350tnl 3 AM wilderness> hideThese shadows are too uncivilized for you to hide in.

<876hp 100% 56% 24350tnl 3 AM wilderness>
A witch closes her eyes with a look of concentration for a moment.
A witch is surrounded by a resistance to acid attacks.

<876hp 100% 56% 24350tnl 3 AM wilderness> barter dragonorb for spores womanA witch nods at you with approval.
You hand the jade dragonorb to a witch.
Three times, a witch hands the spores of a sundew to you.



<876hp 100% 79% 24350tnl 7 AM wilderness> list all woman Item (Type)
<40 31250> the jade dragonorb (talisman)
<30 3125> a pink orb (talisman)
<42 1750> the spores of a sundew (trap ingredient)
<33 225> a small vial of fairy dust (trap ingredient)
<10 6> a violet potion (potion)
<10 250> a sprig of dried herbs (pill)

All the shrewd trade edge does is increase the number of items you get back, it has zero to do with costs & values.