Commerce
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This information is reliable as of patch 2.0.201.56. |
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
$ {\text{Multiplier}}=0.07\times ({\text{Ego Modifier}}+2{\text{(if Snake Oiler)}})+0.35 $
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 (with Glotrot)}}=0.14 $
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).
When buying an item from a trader, the value of the item in question is divided by this multiplier. When an item is sold by the player, its value is multiplied by the multiplier.
| Ego/Trade Modifier | Sell Price | Buy Price | Buy:Sell Ratio |
|---|---|---|---|
| -5 or lower | .05 | 20 | 400 |
| -4 | .07 | 14.3 | 204 |
| -3 (or glotrot) | .14 | 7.14 | 51.0 |
| -2 | .21 | 4.76 | 22.7 |
| -1 | .28 | 3.57 | 12.8 |
| 0 | .35 | 2.86 | 8.16 |
| +1 | .42 | 2.38 | 5.67 |
| +2 | .49 | 2.04 | 4.16 |
| +3 | .56 | 1.79 | 3.19 |
| +4 | .63 | 1.59 | 2.52 |
| +5 | .70 | 1.43 | 2.04 |
| +6 | .77 | 1.30 | 1.69 |
| +7 | .84 | 1.19 | 1.42 |
| +8 | .91 | 1.10 | 1.21 |
| +9 or higher | .95 | 1.05 | 1.11 |
Reputation Effect on Trade Prices
Reputation with the merchant also affects trade prices, acting essentially as a bonus or penalty to the player's ego modifier.
| Reputation with merchant | Bonus applied to Ego Modifier for Trade |
|---|---|
| 600 or more | +3 bonus |
| 250 to 599 | +1 bonus |
| -249 to 249 | 0 |
| -599 to -250 | -1 penalty |
| -600 or less | -3 penalty |
Sacred Well Reputation Formula
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 an object that has no specified value defaults to 10 reputation.
Book Experience Formula
$ {\text{Exp}}={\text{Floor}}({\frac {Commerce^{2}}{25}}) $
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
| Item | Value | Weight | Category |
|---|---|---|---|
| Item | Value | Weight | Category |
 Otherpearl | 33333 | 0# | Bracelets |
 Hand-E-Nuke | 10000 | 1# | Grenades |
 Kesil Face | 10000 | 1# | Masks |
 Shemesh Face | 8000 | 1# | Masks |
 circle of light in the chord of Ehalcodon | 7500 | 1# | Floating Nearby |
 circle of light in the chord of Agolgot | 7500 | 1# | Floating Nearby |
 circle of light in the chord of Shugruith | 7500 | 1# | Floating Nearby |
 circle of light in the chord of Qon | 7500 | 1# | Floating Nearby |
 circle of light in the chord of Qas | 7500 | 1# | Floating Nearby |
 circle of light in the chord of Bethsaida | 7500 | 1# | Floating Nearby |
 circle of light in the chord of Rermadon | 7500 | 1# | Floating Nearby |
 flange from the Great Machine | 6666 | 250# | Armor |
 sail from the Great Machine | 6666 | 50# | Cloaks |
 gauge from the Great Machine | 6666 | 50# | Masks |
 gear from the Great Machine | 6666 | 50# | Shields |
 Earth Face | 6500 | 1# | Masks |
 zetachrome lune | 6000 | 35# | Armor |
 Levant Face | 5000 | 1# | Masks |
 mecha power core | 4000 | 70# | Items |
 Null Face | 4000 | 1# | Masks |
 Olive Face | 4000 | 1# | Masks |
 swarm rack | 3200 | 300# | Heavy Weapons |
 timecube | 3000 | 1# | Trinkets |
 mental aggregator | 2265 | 1# | Helmets |
 psychodyne helmet | 2140 | 12# | Helmets |
 transkinetic cuffs | 2100 | 6# | Bracelets |
 cathedra with white opal tracery | 2000 | 20# | Cybernetics |
 cathedra with sapphire tracery | 2000 | 20# | Cybernetics |
 cathedra with ruby tracery | 2000 | 20# | Cybernetics |
 cathedra with black opal tracery | 2000 | 20# | Cybernetics |
 phase cannon | 2000 | 5# | Heavy Weapons |
 Fist of the Ape God | 2000 | 120# | Cudgels |
 blast cannon | 2000 | 70# | Heavy Weapons |
 spaser rifle | 2000 | 16# | Rifles |
 flawless crysteel shardmail | 1900 | 40# | Armor |
 leyline puppeteers | 1750 | 10# | Gloves |
 black mote | 1666 | 0# | Floating Nearby |
 crystalline halo | 1666 | 5# | Helmets |
 crystalline jile | 1666 | 3# | Short Blades |
 chassis plate | 1600 | 300# | Cloaks |
 Kah's loop | 1500 | 1# | Armlets |
 Va'am's lens | 1500 | 15# | Shields |
 Dagasha's spur | 1500 | 30# | Hats |
 Nacham's ribbon | 1500 | 8# | Cloaks |
 tri-hologram bracelet | 1500 | 1# | Bracelets |
 zetachrome pumps | 1500 | 10# | Footwear |
 zetachrome gloves | 1500 | 10# | Gloves |
 zetachrome apex | 1500 | 8# | Helmets |
 high-energy thermo cask | 1500 | 40# | Armor |
 two-handed zetachrome long sword | 1500 | 8# | Long Blades |
 zetachrome long sword | 1500 | 4# | Long Blades |
 zetachrome halberd | 1500 | 9# | Axes |
 zetachrome battle axe | 1500 | 5# | Axes |
 zetachrome warhammer | 1500 | 9# | Cudgels |
 zetachrome hammer | 1500 | 5# | Cudgels |
 spaser pistol | 1500 | 8# | Pistols |
 light rail | 1500 | 16# | Rifles |
 3D cobblers | 1400 | 5# | Footwear |
 zetachrome dagger | 1390 | 2# | Short Blades |
 high-voltage arc winder | 1250 | 4# | Pistols |
 cloning draught | 1250 | 0.25# | |
 chiral rings | 1250 | 10# | Floating Nearby |
 enigma cone | 1250 | 28# | Armor |
 longreach grappling gun | 1250 | 4# | Pistols |
 phial of brain brine | 1233 | 1# | |
 brain brine | 1233 | 0.25# | |
 nullray pistol | 1200 | 5# | Pistols |
 crysteel shardmail | 1200 | 40# | Armor |
 hand rail | 1050 | 8# | Pistols |
 salt kraken corpse | 1000 | 40000# | Corpses |
 neutron flux | 1000 | 2.5# | |
| phial of neutron flux | 1000 | 3.5# | |
 thermo cask | 1000 | 40# | Armor |
 anti-gravity boots | 1000 | 4# | Footwear |
 warm static | 1000 | 0.25# | |
| great saltback corpse | 1000 | 40000# | Corpses |
 gas tumbler | 1000 | 20# | Equipment |
 di-thermo beam | 1000 | 6# | Pistols |
 chain laser | 1000 | 40# | Heavy Weapons |
 sunslag | 1000 | 0.25# | |
| phial of sunslag | 1000 | 1# | |
 dazzle cheek | 999 | 1# | Masks |
 psychic meridian | 999 | 3# | Helmets |
 palladium mesh tabard | 925 | 9# | Cloaks |
 nano-neuro animator | 900 | 12# | Tools |
 helping hands | 900 | 20# | Backpacks |
 kaleidocera krakows | 900 | 11# | Footwear |
 kaleidocera muffs | 900 | 11# | Gloves |
 night-sight interpolators | 900 | 2# | Eyewear |
 kaleidocera cape | 900 | 11# | Cloaks |
 psychal fleshgun | 900 | 1# | Pistols |
 eigenrifle | 900 | 12# | Rifles |
 gyrocopter backpack | 800 | 10# | Backpacks |
 point-defense drone | 800 | 5# | Floating Nearby |
 nanoweave vest | 795 | 10# | Armor |
 space inverter | 750 | 4# | Pistols |
 hypertractor | 750 | 28# | Rifles |
 linear cannon | 750 | 40# | Heavy Weapons |
 laser rifle | 750 | 9# | Rifles |
 arc winder | 750 | 4# | Pistols |
Note for liquids, their base commerce is multiplied by 4 to have an integer weight.
