Do you have a banker-toon? Do you sell stuff on AH? If so, this addon is for you. In short, you will be able to see how long you have had an item even if you put it up for auction and get it back unsold. ItemAge tracks how long you have had an item or a stack of items.

New in v0.03:
[added] A single function for other addons to retrieve the age of items (read the API.txt file)

New in v0.02:
[added] Display in tooltips

The addon
I made this addon because my bankers are always loaded with items and I loose track of how long I have had the different things in my bags. Basically, this addon adds a new number to every item-icon in your bags and/or bank (selectable) denoting how long you have had the item. That's basically all there is to it.
The beauty of it is that the data persists even if you put the item up for auction. When you get the unsold item back, the age will still be correct. This even works on equal items. Say you have two stacks of some leather - this addon may put different ages on those. So if you have 20 equal items in your bags/bank, they may all still have different ages, and this addon will track it.
This feature also works if you send an item to an alt and then send it back. The age will still be correct. (If you leave the item at your alt for weeks, the data may be erased)

Options
There are not many options available, since it basically works directly out of the box. The age-displays can be switched on or off in your bags or bank by typing "/age bags" or "/age bank". This will only toggle the display itself. If all is switched off, it will still register when new items are added to your inventory.
ItemAge can also be assigned a key so you can press a key to show/hide the display whenever you want to check the ages. This is very handy for non-banker toons, and can be assigned from WoW's standard key-binding interface.

Guild bank
Guild bank is a problem in WoW. ItemAge works by using an internal facility in WoW, and guild-banks does not support this facility very well. For some items (VERY few), the guild-bank will retain this information. For all other items, it will not show an age in the guild bank. This is unfortunate, and can not be helped with the current version of WoW. However, the guild-bank does not discard the information, and by moving the item to your bags, the information will reappear.

Supported items
Most items in WoW is trackable. However, items you have bought from a vendor will basically never be trackable. This is due to how WoW generates the items. A vendor-bought item will be generic and undistinguishable from another vendor-bought item.

Stacks of items
Many items are stackable, like leather and cloth. If you already have a stack that is not full and you receive one more item, WoW will merge the new item into your old stack. The "new" stack will be registered with the age of the old stack.
This is particularly important to notice when retrieving unsold items from ther AH and you already have a half-full stack in your bags of the same item.

Commands
Type "/age" for a brief list. The commands are:
/age bags -> Bag-display on/off
/age bank -> Bank-display on/off
/age gbank -> Guild-bank on/off (note that guild-bank does usually not show anyway because of WoW's handling of these items)

Patch notes for ItemAge
It doesn't look like we have any patch notes for this mod.

ItemAge, archived on 21/08/08
ItemAge, archived on 25/08/08