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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 Category
Page Commerce Category
The Kesil Face 10,000.0 Masks
Hand-E-Nuke 10,000.0 Grenades
The Shemesh Face 8,000.0 Masks
The Earth Face 6,500.0 Masks
Zetachrome lune 6,000.0 Armor
The Levant Face 5,000.0 Masks
The Null Face 4,000.0 Masks
Timecube 3,000.0 Trinkets
Mental aggregator 2,265.0 Helmets
Phase cannon 2,000.0 Rifles
Fist of the Ape God 2,000.0 Cudgels
Flawless crysteel shardmail 1,900.0 Armor
Dagasha's spur 1,500.0 Hats
Zetachrome battle axe 1,500.0 Axes
Va'am's lens 1,500.0 Shields
Zetachrome halberd 1,500.0 Axes
Zetachrome hammer 1,500.0 Cudgels
Nacham's ribbon 1,500.0 Cloaks
Zetachrome long sword 1,500.0 Long Blades
Zetachrome warhammer 1,500.0 Cudgels
Zetachrome pumps 1,500.0 Footwear
Kah's loop 1,500.0 Armlets
Zetachrome gloves 1,500.0 Gloves
Two-handed zetachrome long sword 1,500.0 Long Blades
Zetachrome apex 1,500.0 Helmets
Zetachrome dagger 1,390.0 Short Blades
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
Point-defense drone 800.0 Items
Nanoweave vest 795.0 Armor
Eigenrifle 750.0 Rifles
Hypertractor 750.0 Rifles
Laser rifle 750.0 Rifles
Plastifer chem vest 750.0 Armor
Linear cannon 750.0 Rifles
Freeze ray 750.0 Rifles
Geomagnetic disc 750.0 Thrown Weapons
Flawless crysteel mace 720.0 Cudgels
Flawless crysteel long sword 720.0 Long Blades
Flawless crysteel warhammer 720.0 Cudgels
Flawless crysteel great sword 720.0 Long Blades
Flawless crysteel battle axe 720.0 Axes
Flawless crysteel halberd 720.0 Axes
Flawless crysteel dagger 690.0 Short Blades
Blood-gradient hand vacuum 666.0 Pistols
Flawless crysteel boots 650.0 Footwear
Flawless crysteel gauntlets 650.0 Gloves
Plastifer jerkin 650.0 Armor
Flawless crysteel coronet 650.0 Helmets
Metamorphic polygel 600.0 Applicators
Ganglionic teleprojector 595.0 Helmets
Rainboweave cloak 535.0 Cloaks
Powered exoskeleton 535.0 Back Equipment
Maghammer 520.0 Cudgels
Scroll bound by a strand of kelp 500.0 Books
Military security card 500.0 Security Cards
Stopsvalinn 500.0 Bucklers
Quantum mote 500.0 Light Sources
Mechanical wings 500.0 Backpacks
The Flume-Flier of the Sky-Bear 500.0 Backpacks
Kindrish 500.0 Armlets
The Ruin of House Isner 500.0 Pistols
Grenade launcher 490.0 Heavy Weapons
Missile launcher 490.0 Heavy Weapons
High-fidelity matter recompositer 480.0 Items
Overloaded laser pistol 450.0 Pistols
Cybernetics credit wedge 450.0
Law-enforcement security card 400.0 Security Cards
Crysteel boots 400.0 Footwear
Point-defense laser 400.0 Items
Crysteel gauntlets 400.0 Gloves
Crysteel coronet 400.0 Helmets
Rocket skates 400.0 Footwear
Symbiotic firefly 400.0 Light Sources
Ninefold boots 400.0 Footwear
Laser pistol 400.0 Pistols
Crysteel great sword 390.0 Long Blades
Plastic armor 390.0 Armor
Crysteel long sword 390.0 Long Blades
Crysteel battle axe 390.0 Axes
Crysteel halberd 390.0 Axes
Crysteel mace 390.0 Cudgels
Crysteel warhammer 390.0 Cudgels
Penetrating radar 360.0 Items
Biodynamic power plant 360.0 Items
Plastifer bonnet 350.0 Hats
Rough emerald gemstone 350.0 Trade Goods
Rough peridot gemstone 350.0 Trade Goods
Plastifer sneakers 350.0 Footwear
Plastifer gloves 350.0 Gloves
Fullerite plate mail 345.0 Armor
Amaranthine prism 335.0 Floating Nearby
Fullerite flake armor 320.0 Armor
Rhinox-skull maul 320.0 Cudgels
Crysteel dagger 310.0 Short Blades