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Caves of Qud has a bartering system where items vary in price based on a multitude of factors. Commerce is the base value that is specified for each item that is then multiplied or divided by a multiplier depending on selling or buying.

Trading Multiplier Formula[edit | edit source]

\text{Multiplier} = \frac{0.07 \times (\text{Ego Modifier} + 2\text {(if Snake Oiler)}) + 0.35}{5(\text{if Socially Repugnant)}}

If the player has Glotrot, Ego modifier and Snake oiler no longer have an effect and returns a flat -3. The equation then becomes

\text{Multiplier} = \frac{(0.07 \times -3) + 0.35}{5(\text{if Socially Repugnant)}}

The multiplier cannot be higher than 0.95(achievable with +9 Ego modifier or +7 Ego modifier with Snake Oiler) and the multiplier cannot be lower than .05 (-5 Ego modifier or -2 Ego modifier with Socially Repugnant).

When buying an item from a trader, this multiplier is divided by the value of the item in question. When the item is sold, the value is multiplied by the multiplier.

Sacred Well Reputation Formula[edit | edit source]

Main article: Sacred well

How much reputation the Sacred well gives is also dependent on the commerce value of the object.

 \text{Reputation} = \text{Commerce}/10

Reputation cannot go lower than 1, and if an object that has no specified value defaults to 10 reputation.

Book Experience Formula[edit | edit source]

\text{Exp} = \text{Floor}(\frac{Commerce^2}{25})

Modifications and Commerce[edit | edit source]

Each modification has a Value attribute that is multiplied against the base Commerce value to get the new modified value.

Items by Commerce Value[edit | edit source]

Page Commerce Categoriy
Page Commerce Categoriy
Hand-E-Nuke 10,000.0 Grenades
Zetachrome lune 6,000.0 Armor
Timecube 3,000.0 Trinkets
Mental aggregator 2,265.0 Helmets
Fist of the Ape God 2,000.0 Cudgels
Phase cannon 2,000.0 Rifles
Flawless crysteel shardmail 1,900.0 Armor
Zetachrome gloves 1,500.0 Gloves
Zetachrome pumps 1,500.0 Footwear
Zetachrome apex 1,500.0 Helmets
Zetachrome hammer 1,500.0 Cudgels
Zetachrome battle axe 1,500.0 Axes
Zetachrome warhammer 1,500.0 Cudgels
Zetachrome long sword 1,500.0 Long Blades
Zetachrome halberd 1,500.0 Axes
Two-handed zetachrome long sword 1,500.0 Long Blades
Zetachrome dagger 1,390.0 Short Blades
Plastifer chem vest 1,350.0 Armor
Nullray pistol 1,200.0 Pistols
Crysteel shardmail 1,200.0 Armor
Anti-gravity boots 1,000.0 Footwear
Chain laser 1,000.0 Rifles
Nano-neuro animator 900.0 Tools
Helping hands 900.0 Backpacks
Gyrocopter backpack 800.0 Backpacks
Nanoweave vest 795.0 Armor
Mutating gaze 750.0 Natural Weapons
Geomagnetic disc 750.0 Thrown Weapons
Laser rifle 750.0 Rifles
Linear cannon 750.0 Rifles
Eigenrifle 750.0 Rifles
Freeze ray 750.0 Rifles
Hypertractor 750.0 Rifles
Flawless crysteel mace 720.0 Cudgels
Flawless crysteel battle axe 720.0 Axes
Flawless crysteel warhammer 720.0 Cudgels
Flawless crysteel long sword 720.0 Long Blades
Flawless crysteel halberd 720.0 Axes
Flawless crysteel great sword 720.0 Long Blades
Flawless crysteel dagger 690.0 Short Blades
Blood-gradient hand vacuum 666.0 Pistols
Flawless crysteel boots 650.0 Footwear
Plastifer jerkin 650.0 Armor
Flawless crysteel coronet 650.0 Helmets
Flawless crysteel gauntlets 650.0 Gloves
Metamorphic polygel 600.0 Applicators
Ganglionic teleprojector 595.0 Helmets
Rainboweave cloak 535.0 Cloaks
Powered exoskeleton 535.0 Backpacks
Maghammer 520.0 Cudgels
The Flume-Flier of the Sky-Bear 500.0 Backpacks
Ruin of House Isner 500.0 Pistols
Quantum mote 500.0 Light Sources
Military security card 500.0 Security Cards
Mechanical wings 500.0 Backpacks
Stopsvalinn 500.0 Bucklers
Scroll bound by a strand of kelp 500.0 Books
Kindrish 500.0 Armlets
Grenade launcher 490.0 Heavy Weapons
Missile launcher 490.0 Heavy Weapons
Overloaded laser pistol 450.0 Pistols
Cybernetics credit wedge 450.0
Crysteel coronet 400.0 Helmets
Crysteel gauntlets 400.0 Gloves
Law-enforcement security card 400.0 Security Cards
Laser pistol 400.0 Pistols
Symbiotic firefly 400.0 Light Sources
Rocket skates 400.0 Footwear
Crysteel boots 400.0 Footwear
Crysteel mace 390.0 Cudgels
Crysteel battle axe 390.0 Axes
Crysteel warhammer 390.0 Cudgels
Crysteel long sword 390.0 Long Blades
Crysteel halberd 390.0 Axes
Crysteel great sword 390.0 Long Blades
Plastic armor 390.0 Armor
Rough emerald gemstone 350.0 Trade Goods
Rough peridot gemstone 350.0 Trade Goods
Plastifer sneakers 350.0 Footwear
Plastifer bonnet 350.0 Hats
Plastifer gloves 350.0 Gloves
Fullerite plate mail 345.0 Armor
Amaranthine prism 335.0 Floating Nearby
Rhinox-skull maul 320.0 Cudgels
Fullerite flake armor 320.0 Armor
Crysteel dagger 310.0 Short Blades
Eta and the Earthling, Canto I 300.0 Books
Mortar tube 300.0 Heavy Weapons
Arc cannon 300.0 Heavy Weapons
Emergency-services security card 300.0 Security Cards
Blast cannon 300.0 Heavy Weapons
On the Origins and Nature of the Dark Calculus 300.0 Books
Swarm rack 300.0 Heavy Weapons
Chrome mantle 300.0 Cloaks
From Entropy to Hierarchy 300.0 Books
Disquisition on the Malady of the Mimic 300.0 Books
Crime and Punishment 300.0 Books
Fullerite aegis 300.0 Shields
Cybernetics credit wedge 300.0
Vibro blade 300.0 Long Blades