This article has information that is missing or not up to par.
Reason: What does commerce have to do with book experience? also, this info is better on other pages.
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
If the player has Glotrot, Ego modifier and Snake oiler no longer have an effect and returns a flat -3. The equation then becomes
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
How much reputation the Sacred well gives is also dependent on the commerce value of the object.
Reputation cannot go lower than 1, and if an object that has no specified value defaults to 10 reputation.
Book Experience Formula
Modifications and Commerce
Each modification has a Value attribute that is multiplied against the base Commerce value to get the new modified value.
Items by Commerce Value
| Page | Commerce | Category |
| Page | Commerce | Category |
| Otherpearl | 33,333.0 | Bracelets |
| Kesil Face | 10,000.0 | Masks |
| Hand-E-Nuke | 10,000.0 | Grenades |
| Shemesh Face | 8,000.0 | Masks |
| Circle of light in the chord of Rermadon | 7,500.0 | Floating Nearby |
| Circle of light in the chord of Qas | 7,500.0 | Floating Nearby |
| Circle of light in the chord of Bethsaida | 7,500.0 | Floating Nearby |
| Circle of light in the chord of Shugruith | 7,500.0 | Floating Nearby |
| Circle of light in the chord of Qon | 7,500.0 | Floating Nearby |
| Circle of light in the chord of Ehalcodon | 7,500.0 | Floating Nearby |
| Circle of light in the chord of Agolgot | 7,500.0 | Floating Nearby |
| Sail from the Great Machine | 6,666.0 | Cloaks |
| Gear from the Great Machine | 6,666.0 | Shields |
| Flange from the Great Machine | 6,666.0 | Armor |
| Gauge from the Great Machine | 6,666.0 | Masks |
| Earth Face | 6,500.0 | Masks |
| Zetachrome lune | 6,000.0 | Armor |
| Levant Face | 5,000.0 | Masks |
| Olive Face | 4,000.0 | Masks |
| Null Face | 4,000.0 | Masks |
| Mecha power core | 4,000.0 | Items |
| Swarm rack | 3,200.0 | Heavy Weapons |
| Timecube | 3,000.0 | Trinkets |
| Mental aggregator | 2,265.0 | Helmets |
| Psychodyne helmet | 2,140.0 | Helmets |
| Transkinetic cuffs | 2,100.0 | Bracelets |
| Spaser rifle | 2,000.0 | Rifles |
| Cathedra with white opal tracery | 2,000.0 | Cybernetics |
| Blast cannon | 2,000.0 | Heavy Weapons |
| Cathedra with ruby tracery | 2,000.0 | Cybernetics |
| Phase cannon | 2,000.0 | Heavy Weapons |
| Fist of the Ape God | 2,000.0 | Cudgels |
| Cathedra with sapphire tracery | 2,000.0 | Cybernetics |
| Cathedra with black opal tracery | 2,000.0 | Cybernetics |
| Flawless crysteel shardmail | 1,900.0 | Armor |
| Leyline puppeteers | 1,750.0 | Gloves |
| Crystalline halo | 1,666.0 | Helmets |
| Black mote | 1,666.0 | Floating Nearby |
| Crystalline jile | 1,666.0 | Short Blades |
| Chassis plate | 1,600.0 | Cloaks |
| Spaser pistol | 1,500.0 | Pistols |
| Two-handed zetachrome long sword | 1,500.0 | Long Blades |
| Zetachrome hammer | 1,500.0 | Cudgels |
| Zetachrome halberd | 1,500.0 | Axes |
| Dagasha's spur | 1,500.0 | Hats |
| Zetachrome apex | 1,500.0 | Helmets |
| Zetachrome gloves | 1,500.0 | Gloves |
| Light rail | 1,500.0 | Rifles |
| Zetachrome warhammer | 1,500.0 | Cudgels |
| Zetachrome long sword | 1,500.0 | Long Blades |
| High-energy thermo cask | 1,500.0 | Armor |
| Kah's loop | 1,500.0 | Armlets |
| Va'am's lens | 1,500.0 | Shields |
| Zetachrome pumps | 1,500.0 | Footwear |
| Zetachrome battle axe | 1,500.0 | Axes |
| Nacham's ribbon | 1,500.0 | Cloaks |
| Tri-hologram bracelet | 1,500.0 | Bracelets |
| 3D cobblers | 1,400.0 | Footwear |
| Zetachrome dagger | 1,390.0 | Short Blades |
| High-voltage arc winder | 1,250.0 | Pistols |
| Chiral rings | 1,250.0 | Floating Nearby |
| Enigma cone | 1,250.0 | Armor |
| Longreach grappling gun | 1,250.0 | Pistols |
| Nullray pistol | 1,200.0 | Pistols |
| Crysteel shardmail | 1,200.0 | Armor |
| Hand rail | 1,050.0 | Pistols |
| Anti-gravity boots | 1,000.0 | Footwear |
| Thermo cask | 1,000.0 | Armor |
| Gas tumbler | 1,000.0 | Equipment |
| Di-thermo beam | 1,000.0 | Pistols |
| Chain laser | 1,000.0 | Heavy Weapons |
| Psychic meridian | 999.0 | Helmets |
| Dazzle cheek | 999.0 | Masks |
| Palladium mesh tabard | 925.0 | Cloaks |
| Kaleidocera muffs | 900.0 | Gloves |
| Kaleidocera cape | 900.0 | Cloaks |
| Eigenrifle | 900.0 | Rifles |
| Night-sight interpolators | 900.0 | Eyewear |
| Nano-neuro animator | 900.0 | Tools |
| Kaleidocera krakows | 900.0 | Footwear |
| Psychal fleshgun | 900.0 | Pistols |
| Helping hands | 900.0 | Backpacks |
| Point-defense drone | 800.0 | Floating Nearby |
| Gyrocopter backpack | 800.0 | Backpacks |
| Nanoweave vest | 795.0 | Armor |
| Space inverter | 750.0 | Pistols |
| Geomagnetic disc | 750.0 | Thrown Weapons |
| Freeze ray | 750.0 | Rifles |
| Linear cannon | 750.0 | Heavy Weapons |
| Hypertractor | 750.0 | Rifles |
| Plastifer chem vest | 750.0 | Armor |
| Arc winder | 750.0 | Pistols |
| Laser rifle | 750.0 | Rifles |
| Flawless crysteel battle axe | 720.0 | Axes |
| Flawless crysteel long sword | 720.0 | Long Blades |
| Flawless crysteel mace | 720.0 | Cudgels |
| Flawless crysteel halberd | 720.0 | Axes |
| Flawless crysteel great sword | 720.0 | Long Blades |
| Flawless crysteel warhammer | 720.0 | Cudgels |
| Precision nanon fingers | 700.0 | Gloves |
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