Commerce

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, this multiplier is divided by the value of the item in question. When the item is sold, the value is multiplied by the multiplier.

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

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

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

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
salt kraken corpse	$15000	40000#	Corpses
great saltback corpse	$15000	40000#	Corpses
Hand-E-Nuke	$10000	1#	Grenades
Kesil Face	$10000	1#	Masks
Shemesh Face	$8000	1#	Masks
circle of light in the chord of Shugruith	$7500	1#	Floating Nearby
circle of light in the chord of Rermadon	$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 Agolgot	$7500	1#	Floating Nearby
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 black opal tracery	$2000	20#	Cybernetics
cathedra with white opal tracery	$2000	20#	Cybernetics
cathedra with ruby tracery	$2000	20#	Cybernetics
cathedra with sapphire tracery	$2000	20#	Cybernetics
Fist of the Ape God	$2000	120#	Cudgels
blast cannon	$2000	70#	Heavy Weapons
phase cannon	$2000	5#	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
Va'am's lens	$1500	15#	Shields
zetachrome pumps	$1500	10#	Footwear
zetachrome gloves	$1500	10#	Gloves
Kah's loop	$1500	1#	Armlets
tri-hologram bracelet	$1500	1#	Bracelets
Dagasha's spur	$1500	30#	Hats
zetachrome apex	$1500	8#	Helmets
Nacham's ribbon	$1500	8#	Cloaks
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
chiral rings	$1250	10#	Floating Nearby
enigma cone	$1250	28#	Armor
longreach grappling gun	$1250	4#	Pistols
high-voltage arc winder	$1250	4#	Pistols
cloning draught	$1250	0.25#
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
warm static	$1000	0.25#
neutron flux	$1000	2.5#
phial of neutron flux	$1000	3.5#
anti-gravity boots	$1000	4#	Footwear
gas tumbler	$1000	20#	Equipment
thermo cask	$1000	40#	Armor
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
helping hands	$900	20#	Backpacks
kaleidocera krakows	$900	11#	Footwear
nano-neuro animator	$900	12#	Tools
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
point-defense drone	$800	5#	Floating Nearby
gyrocopter backpack	$800	10#	Backpacks
nanoweave vest	$795	10#	Armor
plastifer chem vest	$750	20#	Armor
geomagnetic disc	$750	1#	Thrown Weapons
linear cannon	$750	40#	Heavy Weapons
space inverter	$750	4#	Pistols
arc winder	$750	4#	Pistols
hypertractor	$750	28#	Rifles
freeze ray	$750	28#	Rifles
laser rifle	$750	9#	Rifles
flawless crysteel great sword	$720	8#	Long Blades
flawless crysteel long sword	$720	4#	Long Blades

More...

Note for liquids, their base commerce is multiplied by 4 to have an integer weight.

Items sorted by Commerce/Weight

Item	Value per Pound
Item	Value per Pound
Kesil Face	10,000.0
Hand-E-Nuke	10,000.0
Shemesh Face	8,000.0
circle of light in the chord of Agolgot	7,500.0
circle of light in the chord of Bethsaida	7,500.0
circle of light in the chord of Qas	7,500.0
circle of light in the chord of Qon	7,500.0
circle of light in the chord of Rermadon	7,500.0
circle of light in the chord of Shugruith	7,500.0
Earth Face	6,500.0
Levant Face	5,000.0
cloning draught	5,000.0
brain brine	4,932.0
Olive Face	4,000.0
Null Face	4,000.0
sunslag	4,000.0
warm static	4,000.0
timecube	3,000.0
mental aggregator	2,265.0
tri-hologram bracelet	1,500.0
Kah's loop	1,500.0
phial of brain brine	1,233.0
phial of sunslag	1,000.0
dazzle cheek	999.0
psychal fleshgun	900.0
geomagnetic disc	750.0
precision nanon fingers	700.0
zetachrome dagger	695.0
metamorphic polygel	600.0
crystalline jile	555.3333333333334
rainboweave cloak	535.0
n-pointed asterisk	500.0
Kindrish	500.0
military security card	500.0
quantum mote	500.0
scroll bound by a strand of kelp	500.0
crystal of Eve	475.0
night-sight interpolators	450.0
smooth emerald gemstone	420.0
smooth peridot gemstone	420.0
phase cannon	400.0
neutron flux	400.0
law-enforcement security card	400.0
symbiotic firefly	400.0
zetachrome long sword	375.0
stasis projector	360.0
smooth sapphire gemstone	360.0
transkinetic cuffs	350.0
arsplice seed	350.0
rough emerald gemstone	350.0
rough peridot gemstone	350.0
From Entropy to Hierarchy, 2nd Edition	350.0
flawless crysteel dagger	345.0
amaranthine prism	335.0
crystalline halo	333.2
psychic meridian	333.0
high-voltage arc winder	312.5
longreach grappling gun	312.5
dream rondure	300.0
zetachrome battle axe	300.0
smooth amethyst gemstone	300.0
rough sapphire gemstone	300.0
emergency-services security card	300.0
zetachrome hammer	300.0
On the Origins and Nature of the Dark Calculus	300.0
From Entropy to Hierarchy	300.0
Disquisition on the Malady of the Mimic	300.0
Crime and Punishment	300.0
Eta and the Earthling, Canto I	300.0
Modulo Moon Stair and the Tree of Life	300.0
phial of neutron flux	285.7142857142857
3D cobblers	280.0
Slog's annunclus	250.0
anti-gravity boots	250.0
rough amethyst gemstone	250.0
Schrodinger page from the Annals of Qud	250.0
farmer's token	250.0
merchant's token	250.0
minstrel's token	250.0
Council at Gamma Rock	250.0
mercurial cloak	250.0
onboard recoiler	240.0
nullray pistol	240.0
smooth jasper gemstone	240.0
reprogrammable recoiler	210.0
stasis entangler	200.0
gold nugget	200.0
rough jasper gemstone	200.0
jeweled sandals	200.0
maintenance security card	200.0
gold key	200.0
floating glowsphere	200.0
Frivolous Lives, Vol. I	200.0
Across Moghra'yi, Vol. I: The Sunderlies	200.0
Across Moghra'yi, Vol. II: Athenreach	200.0
Across Moghra'yi, Vol. III: Oth, the Free City	200.0
In Maqqom Yd	200.0
Nacham's ribbon	187.5
zetachrome apex	187.5
two-handed zetachrome long sword	187.5

More...

0 Weight Items sorted by Commerce

Item	Value
Item	Value
dried vanta petals	$8
bone meal	$8
sun-dried banana	$8
psychal gland paste	$8
mirror dust	$8
fermented tongue	$8
dream smoke	$8
ubernostrum injector	$75
luminous hoarshroom	$70
sliced bop cheek	$7
optical multiscanner	$600
social coprocessor	$600
skin glitter	$60
Skillsoft [low sp]	$60
optical bioscanner	$60
optical technoscanner	$60
force modulator	$60
electromagnetic sensor	$60
navigation system	$60
taco suprema	$500
cybernetics credit wedge 2¢	$50
albino ape heart	$50
ogre ape heart	$50
concentrated flamebeard gland paste	$5
concentrated sleetbeard gland paste	$5
concentrated tartbeard gland paste	$5
concentrated nullbeard gland paste	$5
concentrated gallbeard gland paste	$5
concentrated dreambeard gland paste	$5
concentrated stillbeard gland paste	$5
concentrated mazebeard gland paste	$5
flamebeard gland paste	$5
sleetbeard gland paste	$5
tartbeard gland paste	$5
nullbeard gland paste	$5
gallbeard gland paste	$5
dreambeard gland paste	$5
stillbeard gland paste	$5
mazebeard gland paste	$5
fire ant gaster paste	$5
cured dawnglider tail	$5
phase silk	$5
fermented yondercane	$5
fermented yuckwheat stem	$5
voider gland paste	$5
crushed grave moss	$5
mashed lag	$5
cybernetics credit wedge 3¢	$450
love injector	$40
blaze injector	$40
hulk honey injector	$40
salve injector	$40
skulk injector	$40
sphynx salt injector	$40
shade oil injector	$40
rubbergum injector	$40
spine fruit jam	$4
pickled mushrooms	$4
freeze-dried hoarshrooms	$4
spark tick plasma	$4
Ekuemekiyyen greens	$4
congealed shade oil	$4
congealed blaze	$4
congealed salve	$4
congealed hulk honey	$4
congealed skulk	$4
congealed love	$4
congealed rubbergum	$4
penetrating radar	$360
holographic visage	$360
Otherpearl	$33333
cybernetics credit wedge 2¢	$300
used injector	$3
empty injector	$3
cybernetics credit wedge 1¢	$25
desalination pellet	$25
Schemasoft [high-tier]	$240
phase-adaptive scope	$240
precision force lathe	$240
wild rice	$20
lover's blossom	$20
starapple jam	$2
pickles	$2
dried lah petals	$2
plump mushroom	$2
zetachrome arrow	$2
dopamine synth	$180
intravenous port	$180
custom visage	$180
equipment rack	$180
bionic liver	$180
Skillsoft [high sp]	$180
Schemasoft [mid-tier]	$180
Skillsoft plus	$180
black mote	$1666
cybernetics credit wedge	$150
night vision	$120
parabolic muscular subroutine	$120
inflatable axons	$120
nocturnal apex	$120

More...