It was possible to elaborate this list (considering only npcs merchants that accept gold and that are permanent):
Thais: Npc Gamon
- Piece of Royal Satin
Yalahar: Npc Dorbin
- Silky Tapestry
- Crystal Table
Svargrond: Npc Janz
- Small Ice Statue (Fish)
- Small Ice Statue (Fish)
Port Hope: Npc Zaidal
- Tusk table
- Tusk Chair
- Thick Trunk
- Small Trunk
- Stone Table (Carved)
- Ivory Chair
- Bamboo Table
- Bamboo Drawer
Banuta: Npc Hairycles
- Monkey Statue (No Hearing)
- Monkey Statue (No Seeing)
- Monkey Statue (No Speaking)
BONUS:
These aren't really furniture merchants, but they sell special and exclusive items.
Farmine: Npc Cael
- Didgeridoo
- War Drum
- Dragon Statue
- Dragon Throne
Meriana: Npc Dunkan
- Pirate Tapestry
Farmine: Npc Pompan
- Dragon Tapestry
- Dragon backpack
- Minotaur Backpack
Bounac: NPC John The Carpenter
- Folded Artefact Carpet I
- Folded Artefact Carpet II
- Folded Artefact Carpet III
- Folded Artefact Carpet IV
- Folded Artefact Carpet V
- Folded Artefact Carpet VI
Isle of Destiny: Npc Raffael
- Oracle Figurine