Errant Merchant

The errant merchant is a supernatural being found in the The Hidden World of Kmuzat. He wanders the lands and, when he finds someone with wealth, offers to trade for an item from his flesh sack. It is unclear where the items come from, who made them, or the nature of their true reality. However, they serve well enough when used in Kmuzat.
The random items can be generated through Donjon's list or through this Google Sheets file.
As a reminder, prices can be randomly generated. Consumables cost half as much as generated (e.g. potions, scrolls, ammunition). If a player character would like to haggle, they can attempt a Charisma (Persuasion) check. Their result will reduce the value by a fixed percentage to a minimum of the rarity's value range. If they perform poorly, the errant merchant will react poorly in turn and raise the price by a fixed percentage, to a maximum of the rarity's value range.

Number of Magical Items Generated by Character

Base Proficiency Modifier	Common	Uncommon	Rare	Very Rare	Legendary
+2	2	-	-	-	-
+3	2	1	-	-	-
+4	3	2	1	-	-
+5	3	2	2	1	-
+6	4	3	2	2	1

Price Ranges for Magical Items

Rarity	Value	Randomly Generated Value
Common	50-100 gp	Generate
Uncommon	101-500 gp	Generate
Rare	501-5,000 gp	Generate
Very Rare	5,001-50,000 gp	Generate
Legendary	50,001+ gp	Generate

Haggling Checks

Charisma (Persuasion) Result	Price Adjustment
<0	+20%
0-5	+10%
6-10	+5%
11-15	+0%
16-20	-5%
21-25	-10%
26-30	-20%
31-35	-30%
36+	-50%