AlreadyKnown
Colorizes items that you already know in default merchant and auction frames.
WoWInterface
Auctionator
Figuring out a good buyout price when posting auctions can be tedious and time-consuming. If you're like most people, you first browse the current auctions to get a sense of how much your item is currently selling for. Then you undercut the lowest price by a bit. If you're creating multiple auctions you're bouncing back and forth between the Browse tab and the Auctions tab, doing lots of division in your head, and doing lots of clicking and typing.
Curse, WoWInterface, Homepage
Auctioneer
The most popular auction mod. Provides you with in-game data on auction house items. Provides methods to identify bargains by identifying price trends and then finding items that will buyout or bidout for less than the trend data suggests should be it's correct price.
Auctioneeraddon, WoWInterface, Curse
AuctionLite
AuctionLite is a simple, lightweight addon that tracks auction house data and improves the interface for buying and selling items. AuctionLite allows you to: Scan the auction house, Search for and buy out auctions, Create auctions based on the current competition, Display tooltips with auction and vendor data.
Curse, WoWInterface
AuctionMaster
A compact auction house tool for being able to sell items like the wind, scanning auctions for item statistics, searching for wanted items in the auction house, looking for good opportunities among the current auctions and displaying the statistics gathered so far in the tooltip of any item.
Curse
Cancelator
Cancelator is a utility to allow easy mass canceling of auctions. Provides options to allow users to cancel all of their auctions, or filter canceling by auction item name, duration, or price. Cancelator provides an easy to use side panel style frame on the Auction's Frame that allows the user to define certain filter options and cancel those auctions. Can also mass cancel all auctions!
Curse
Double Click Buyout
Allows you to quickly purchase items from the auction house by double clicking on them.
Curse
MarketWatcher
Market Watcher is an addon that scans the auction house and records data for specified items and assists in daily auction house shopping in general. When the addon is set to record, a price history can be displayed to assist in determining a value for items of interest.
What makes Market Watcher unique from other auction house addons is that it records multiple scans instead of just the most recent. This obviously uses a great deal of memory, so only scans of items specified by the user will be recorded. The saving of multiple scans allows for a more accurate determination of value, and allows the addon to deduce if some auctions were actually sold, so you can see which auctions are actually selling as opposed to basing a value off the prices of auctions that may not be selling at all.
WoWInterface, Curse
MySales
When you open your mail, MySales keeps track of who bought your auctions and displays the item, money, buyer and when in a table.
Type /ms to bring up the options screen.
WoWInterface
NutCounter
NutCounter is a basic AH stat addon inspired by Auctioneer's BeanCounter. It strives for low resource use while keeping a few basic stats about your auctions: Sellthrough (percent of total auctions posted which were successful), Last sell price and Min and max sell price. Note that due to the way the mailbox returns invoices, items are tracked by name not itemID.
WoWInterface, Curse
QuickAuctions
Quick Auctions is for people who want to automate auction posting and cancelling and don't want to deal with checking 50 auctions, seeing if they were undercut, cancelling and repeating. While this is primarily meant for automating large quantities of auctions it works fine for a few auctions too. This does require a little bit of tweaking for yourself, but the latest version provides a GUI configuration and is much easier to setup and manage. Also includes a summary window that lets you quickly see the status of a group of items on the auction house and queue items for the craft queue to make it easier to see the status of an entire segment of the Auction House market.
WoWInterface, Curse
UnitPrice
Shows Per Unit Pricing for Stacked Items on the Auction House.
Config: /up
Curse