Where does it come from and how hard is it to get?
D.I.S.C.O. comes from the World of Warcraft TCG (trading card game)
TCG Expansion: Hunt for Illidan (Press Release)
Card: Disco Inferno!
Rarity: 1/181 booster packs (speculative)
Distribution: Hunt for Illidan booster boxes contain 24 boosters and cost approx $65 USD (inc. shipping), therefore the average cost of obtaining this particular loot is $490.00

How much would I expect to pay for one off eBay or similar?
According to http://www.wowtcgloot.com/disco.htm (most information sourced from there), the expansion won't be released until the 1st of July 2008. Upperdeck Entertainment the makers of the TCG have specified that all three loot cards (The Footsteps of Illidan, Disco Inferno!, Ethereal Plunderer) are as common as those in the last set, so apart from the inital rush during release the price should for this item should average around less than $40USD.

Facts:

DISCO = Dancer's Integrated Sonic Celebration Oscillator.
When activated a box with mirror ball is placed at feet (with accompaning "boing" sound) and a unique disco sound is played for about 20sec.
The mirror ball lightshow continues for as long as the box remains active.
When the box is clicked (useable by either faction), player gains a "Listening to DISCO" buff and proceeds to /dance.
Useable at any level and therefore available for twinks.

How do the Loot cards work?
Loot cards are special rare versions of WoW TCG cards found in booster packs, starter decks, and raid decks that have a revealable unique code. Once this protective layer concealing the code is scratched away, a 25 digit promotion code is revealed that can be entered into the Blizzard offical promotions page. These codes work for both US and EU servers.

I have the 25 digit loot code, now what?
All accounts from every region in the world use http://www.worldofwarcraft.com/misc/promotion.html to redeem any and all special loot. This webpage allows you to enter the 25 digit promotion code and also select the region and realm for the character that will receive the loot item.

Upon succcessfuly submitting the above information, you will be presented with an in-game code. Write this code down or print it out; you will need it to retrieve your item. Log into the game with the character that is to receive the item and travel to Booty Bay in Stranglethorn Vale. There, you will need to find a goblin by the name of Landro Longshot. He is located on the lower parts of Booty Bay on the docks, and should be easily recognised due to the fact that he has a distinctive purple shirt and two body guards next to him.

When you find Landro, he will first ask if you are here for a promotion, and then ask you which TCG expansion your item comes from (or Points Redemption); check your loot card if you are not sure which item that is. Ensure you have got bag space to hold the item!

Комментарий от Verydarklord

https://www.wowhead.com/tbc/item=13379 anyone?

Комментарий от Dobmiestre

The use of D.I.S.C.O. as an acronym is a possible reference to this song.

Комментарий от 64664

Not sure why Dobmiestre's comment has been downgraded. But in fact it was a really populair disco song back in the late 70's by Ottawan and had exactly the same name.
Each letter stands for a word in that song as well.

Комментарий от Resistance

Complete party set: Picnic Basket, Romantic Picnic Basket, D.I.S.C.O, Fishing Chair, Goblin Gumbo Kettle, Archmage Vargoth's Staff, Totem of Spirits, Brewfest Pony Keg, and Brazier of Dancing Flames.
Summon them all at once in a special spot for completely awesome party!

Комментарий от 86865

When the portable disco ball is placed on the ground you will hear goblins laughing and then the disco music will begin kinda. i got my ears blown away when on PTR evryone outside ogrimmar had there a disco ball and used them about the same time. In the party be sure that you are the only one that can buggy.

Комментарий от Resistance

Added in new party stuff that I forgot.

Комментарий от 83793

i Just got this today its awesome!!!!!
the Item lasts for 5 mins, and as you can see from above it CD is 5 mins.

it plays a pretty cool beat, and makes you dance. also puts a circle of lights around it, about 30 yard radius.

the only thing im curious about tho is whether it has charges or just unlimited uses? i guess only time will tell.

Комментарий от 174283

I got to activate my disco ball today, there are no charges, unlimited use, big crowd pleaser. As for rarity of the card, i bought one pack from my nearest store and i got footsteps and the disco ball from that 1 pack so, its possible guys =)

Комментарий от patryk

You can type the following into the chat line to listen to it:
/script PlaySoundFile("Sound\\Events\\UD_DiscoBallMusic.wav")

Sound when item spawns:
/script PlaySoundFile("Sound\\Events\\UD_DiscoBallSpawn.wav")

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