This mod modifies one novigrad merchant's shop, so he sells rare items, which:
- may be missed by player and never aquired later
- are hard to aquire because many quests must be completed first
- are unobtainable due to mutually exclusive choices
- are aquired randomly and are hard to find intentionally
- do not exist in the world of original game
- are quest items which are later removed from player's inventory by quest scripts

Rare items specifically:
- All witcher gear items, diagrams and maps
- All relic swords and armor items
- All weapon and armor item crafting schematics
- All Gaunter O'Dimm's rewards
- All armor dyes and their crafting diagrams
- All decoction, potion and bomb recipes
- All red, green, blue and monster mutagens
- Potions: Wolven hour, Drowner pheromones, Bear pheromones, Nekker pheromones.
- Tutorial bomb and snowball
- Herbs: Winter cherry, Nazairi basil, Blue lotus flower.
- Starting gear from: Vanilla, Hearts of Stone, Blood and Wine.
- Unique items from Knight Tournament in BaW
- Some character decorations
- Other
    - Yennefer's pants
    - Prisoner shirt and pants
    - Bath towel
    - Wooden sword and wooden plank
    - Hornwall Horn
    - Mutagenerator
    - Magic Acorn
    - Golden Egg
    - Cake (is a lie)
If you need Gwent cards, use The Gwent Card Dealer mod. This and Gwent mod are mutually exclusive, because they modify the same files.

Warning 1: aforementioned merchant is available between 06:00 and 18:00.
Warning 2: make sure other mods do not override changes made by this mod.
Warning 3: buying some witcher gear diagrams makes some witcher-gear-treasure-hunt-quests unfinishable.

How to install:
Extract "modRareItemsMerchant" folder from archive, move it into ".../The Witcher 3/mods/" folder (I mean game installation folder, NOT "My Documents")

Modded files:
DATA\gameplay\items\def_loot_shops.xml (<loot name="_store__LW_Novigrad_General_store")
DATA\gameplay\items_plus\def_loot_shops.xml (the same but for New Game Plus)