Yuriah's inventory can be upgraded up to three times, regardless of the order. For every upgrade, Yuriah will tell you that he has new stocks.
During the beginning quest The Assault on Vigil's Keep, you must save the terrified merchant from darkspawn. He is located in the keep's courtyard.
"The merchant you saved was grateful to be alive--restocked me for a bargain! The savings are yours, of course."
During Oaths of Fealty, you must talk to Lord Eddelbrek in order to activate Defending the Land. You may either choose "Trade must flow. We need supplies to fight the darkspawn." (at the cost of the creatures overwhelming the lands) or "Let's do our best to protect them all." Additionally, you have to complete Trade Must Flow by obtaining both Lillith and Armaas in order for Yuriah to acquire the new stocks.
"Somehow the soldiers have kept the Pilgrim's Path clear despite everything that's going on. Merchant caravans are coming this way regularly. I have some new stock you might be interested in."
Greater Health PoulticeGreater Health PoulticeHerbalism A skilled herbalist has rendered a variety of medicinal ingredients into this soothing, restorative substance.
x3
00008325.6
83 25
00001734.5
17 34
Health Poultice
Health PoulticeHealth PoulticeHerbalism A skilled herbalist has rendered a variety of medicinal ingredients into this soothing, restorative substance.
x9
0000001980
19 80
00000412.5
4 12
Lesser Health Poultice
Lesser Health PoulticeLesser Health PoulticeHerbalism A skilled herbalist has rendered a variety of medicinal ingredients into this soothing, restorative substance.
x12
0000000120
1 20
0000000025
25
Greater Injury Kit
Greater Injury KitGreater Injury KitHerbalism A kit containing bandages and other healing aids.
x13
0000012960
1 29 60
0000002700
27 0
Injury Kit
Injury KitInjury KitHerbalism A kit containing bandages and other healing aids.
x22
0000008370
83 70
0001743.75
17 43
Lesser Injury Kit
Lesser Injury KitLesser Injury KitHerbalism A kit containing bandages and other healing aids.
Lesser Warmth BalmLesser Warmth BalmHerbalism This light balm attunes the user to the element of fire.
+30% fire resistance for 180 seconds.
x14
0000005490
54 90
0001143.75
11 43
Lesser Ice Salve
Lesser Ice SalveLesser Ice SalveHerbalism A sticky, snow-white salve. No two particles of it are identical.
+30% cold resistance for 180 seconds.
x15
0000005490
54 90
0001143.75
11 43
Acidic Grease Trap
Acidic Grease TrapAcidic Grease TrapTrap-Making The acid burns nicely through leather, cloth, and skin. The grease clings to anything. It's a perfect combination for a sadist.
x7
0000015480
1 54 80
0000003225
32 25
Choking Powder Trap
Choking Powder TrapChoking Powder TrapTrap-Making A debilitating kitchen accident with expensive imported spices led to the development of this trap.
x5
0000008460
84 60
00001762.5
17 62
Freeze Trap
Freeze TrapFreeze TrapTrap-Making When packed next to each other, this trap can keep a cut of meat fresh for days longer than otherwise. But its primary use is still as a deadly weapon.
x6
0000002880
28 80
0000000600
6 0
Mild Sleeping Gas Trap
Mild Sleeping Gas TrapMild Sleeping Gas TrapTrap-Making Even the tiny amount of gas leaking out of this trap causes a tingling sensation.
x9
0000002070
20 70
0000431.25
4 31
Large Shrapnel Trap
Large Shrapnel TrapLarge Shrapnel TrapTrap-Making This is not the sort of trap you use to hunt animals for dinner, unless you like your meat tenderized.
Concentrator AgentConcentrator AgentItem Heatherum and Foxite are both common herbs in Ferelden. When distilled to be sufficient purity, they may be used as herbal agents to concentrate the effects of many potions, salves, and poisons.
x99
0000003600
36 0
0000000750
7 50
Glamour Charm
Glamour CharmGlamour CharmItem This minor magical charm captures the viewer's attention and distra... ooo, pretty...
x15
0000002400
24 0
0000000500
5 0
Distillation Agent
Distillation AgentDistillation AgentItem One of the three rare bulbs found in the Frostback Mountains, when dried and powdered they become an excellent distillation agent required to evoke magical properties in crafting.
x99
0000001440
14 40
0000000300
3 0
Corrupter Agent
Corrupter AgentCorrupter AgentItem Said to have been made from lifestone that has been corrupted by the darkspawn taint in the Deep Roads, this powdery agent is required to create some of the most powerful poisons and traps known.
x99
0000001440
14 40
0000000300
3 0
Lifestone
LifestoneLifestoneItem These rare rocks have existed in close proximity to lyrium ore, and as such, they have absorbed some of its traits. Lifestones enhance the natural properties of other materials used in item creation.
x99
0000001200
12 0
0000000250
2 50
Frostrock
FrostrockFrostrockItem These shards of lifestone are infused with magic, either naturally or by one of the Tranquil. Frostrocks radiate cold and can be used in many cold-related potions and traps.
x3
0000001200
12 0
0000000250
2 50
Trap Trigger
Trap TriggerTrap TriggerItem Even the most powerful trap requires a trigger. This bit of metal and wire could easily be turned into one by someone of sufficient skill.
x99
0000000240
2 40
0000000050
50
Deathroot
DeathrootDeathrootItem A harmless enough plant on its own, deathroot's thick leaves contain an extract that the Chasind have used to induce hallucinations for centuries. Sufficiently concentrated, it can be made into a deadly poison.
Blood of the WarriorBlood of the WarriorAmulet Flecks of blood has dried in the links of this necklace. The previous owner came to an unfortunate end.
+2 strength Chance to avoid missile attacks +10 physical resistance
0000094200
9 42 0
0000019625
1 96 25
Golden Cog
Golden CogGolden CogRing Blunt teeth suggest this ring meshes with another. When equipped with the Silver Cog, the character gains a bonus to health regeneration.
+4 willpower +4 magic
0000062400
6 24 0
0000013000
1 30 0
Manual: Shadow
Manual: ShadowManual: ShadowGeneric "You Don't See Me, But That Doesn't Mean I'm Not Here." A maudlin tale of a rogue growing up in a loveless home.
0000120000
12 0 0
0000025000
2 50 0
Backpack (Origins)
BackpackBackpackGeneric This pack is designed to distribute weight evenly, letting explorers fight unfettered even while carrying large quantities of gear. Each backpack purchased automatically increases inventory capacity by 10.
Elf-Flight ArrowElf-Flight ArrowArrow These arrows are perfectly balanced, and will fly more swiftly than the common arrow.
+6 attack Chance to stun
x99
0000005148
51 48
00001072.5
10 72
Ice Arrow
Ice ArrowIce ArrowArrow These arrows are enchanted and will shatter into piercing shards of ice on impact.
+2 Ice damage
x99
0000001584
15 84
0000000330
3 30
Ice Bolt
Ice BoltIce BoltBolt These bolts are enchanted and will shatter into piercing shards of ice on impact.
+3 cold damage
x40
0000002376
23 76
0000000495
4 95
Deep Mushroom
Deep MushroomDeep MushroomItem Fungi found underground in close proximity to lyrium veins. In addition to their restorative properties, they can also be made into poisons.
Use: After chewing a deep mushroom, warriors and rogues regain a small amount of stamina. Mages gain no benefit from chewing deep mushrooms.
BackpackBackpackGeneric This pack is designed to distribute weight evenly, letting explorers fight unfettered even while carrying large quantities of gear. Each backpack purchased automatically increases inventory capacity by 10.
DeathrootDeathrootItem A harmless enough plant on its own, deathroot's thick leaves contain an extract that the Chasind have used to induce hallucinations for centuries. Sufficiently concentrated, it can be made into a deadly poison.
x+13
0000000120
1 20
0000000025
25
Deep Mushroom
Deep MushroomDeep MushroomItem Fungi found underground in close proximity to lyrium veins. In addition to their restorative properties, they can also be made into poisons.
Use: After chewing a deep mushroom, warriors and rogues regain a small amount of stamina. Mages gain no benefit from chewing deep mushrooms.
Novice Immunity RuneNovice Immunity RuneArmor Rune To counter the elements, the Tevinters inscribed this rune.
3% fire resistance 3% cold resistance 3% electricity resistance
x99
0000009600
96 0
0000002000
20 0
Backpack (Origins)
BackpackBackpackGeneric This pack is designed to distribute weight evenly, letting explorers fight unfettered even while carrying large quantities of gear. Each backpack purchased automatically increases inventory capacity by 10.
x+1
0000060000
6 0 0
—
Note: The Fire Bolt and Ice Bolt stocks may show as having two stocks of 99 if you haven't bought any before. One is in an infinite supply while the other is the addition of Yuriah's initial stock with the second upgrade's.
FrostrockFrostrockItem These shards of lifestone are infused with magic, either naturally or by one of the Tranquil. Frostrocks radiate cold and can be used in many cold-related potions and traps.
x+50
0000001200
12 0
0000000250
2 50
Fire Crystal
Fire CrystalFire CrystalItem These shards of lifestone are infused with magic, either naturally or by one of the Tranquil. They're white-hot and useful in many fire-related potions and traps.
x50
0000001200
12 0
0000000250
2 50
Frozen Lightning
Frozen LightningFrozen LightningItem Frozen lightning is a common name for a crystal that can naturally store electricity, which has made it a sought-after ingredient in the composition of several items and salves.
x50
0000001200
12 0
0000000250
2 50
Deathroot
DeathrootDeathrootItem A harmless enough plant on its own, deathroot's thick leaves contain an extract that the Chasind have used to induce hallucinations for centuries. Sufficiently concentrated, it can be made into a deadly poison.
Novice Reservoir RuneNovice Reservoir RuneArmor Rune A Tevinter mark meaning "pool".
+1 willpower
x99
0000012000
1 20 0
0000002500
25 0
Backpack (Origins)
BackpackBackpackGeneric This pack is designed to distribute weight evenly, letting explorers fight unfettered even while carrying large quantities of gear. Each backpack purchased automatically increases inventory capacity by 10.
Yuriah can be used to upgrade most weapons and armor by selling the armor or weapon you wanted to upgrade, saving the game, reloading and buying it back. (Be sure you have the appropriate level to improve the items.) Items enchanted with runes cannot be upgraded in this way. Remove any runes before selling items if you want to upgrade them.
Be careful using Yuriah to upgrade items, as this can also increase the stat requirements for the item, keeping you from equipping an item you used to use. Also, he may not upgrade some items, forcing you to buy back the exact same item for ten times what you sold it to him for. It is advisable that you save before attempting an upgrade. A better approach to upgrading is to store your items in your throne room storage, leave the throne room, and then come back. Doing so has the same effect as selling items, except it's completely free.