By request, I'll be showing how to navigate the Auction window.


Main Window

1 - Rarity Type: All, at least Poor, at least Normal, at least Uncommon, at least Rare, at least Epic, at least Legendary.
2 - Level Range
3 - Weapon
4 - Armor
5 - Accessory
6 - Items
7 - Junk / Materials
8 - Can Use
9 - Can Purchase
10 - Watchlist
11 - Register an item to my Watchlist


Sell Item

1- Register an Item
2 - Duration
3 - Quantity
4 - To purchase or sell an item, you must interact with the Auction NPC.
5 - List Item for Sale
6 - Cancel
7 - Price per Item (Max)
8 - Price per Item (Min)
9 - Price per Item
10 - Total Price
11 - Listing Fee
12 - Sales Fee
13 - Sales Fee (Discount for PC-cafe)

Categories

In game, each category is listed by descending order.

All
Weapon
Main Weapon

• Dagger
  
• Sword
  
• Mace
  
• Hammer
  

Sub Weapon

• Shield
  

Two Hand Weapon

• 2H Hammer
  
• 2H Axe
  
• 2H Mace
  
• Bow
  
• Staff
  
• Wand
  

Armor
Head

• Robe (same sub category for all armor)
  
• Light Armor (same sub category for all armor)
  
• Leather Armor (same sub category for all armor)
  
• Metal Armor (same sub category for all armor)
  

Upper
Lower
Gloves
Boots
Shoulder
Belt

Accessory

• Ring
  
• Necklace
  

Items

• HP Potion
  
• Energy Potion (I assume for Malice / Focus / Rage / MP)
  
• HP & Energy Potion
  
• Gathering Tools
  
• Crafting Materials
  
• Food
  
• Combat Item