The Disk of returning was used to let players exit the Black Hole in RuneScape Classic. At the time, a non-player character called Thordur sold them for 10 coins. This item is the second oldest rare or discontinued item in the game, beating out the pumpkin as this disk was created back in July 2001. The oldest rare is the Half Full Jug of Wine , being released on the first day of RuneScape. This item was discontinued December 2001 after the removal of Thordur and the Black Hole.
People that were banned were put into a hole and trapped there until their ban was over. A lot of people got themselves banned just to see the hole, so Jagex made a mock hole and created a disk to let players out once they went in and to get out of the Black Hole Players would select the spin option on the Disk.
The mock black hole and disk of returning were removed because of a scam involving convincing players to drop their disk while in the black hole, thus trapping them until assisted out by Jagex. The disks were left in game, but no longer had any use.
On 9 June 2010, the inventory image of the Disk of returning changed. The old image was File:Disk of returning.PNG. Before the re-introduction of free trade, Disks along with Easter eggs and Pumpkins, were used as currency to trade up for Partyhats.
In recent history Disks were always cheaper than Pumpkins, but during the past several months, Disks experienced a sudden sharp rise. They rose from around 200 million coins to peaking at just under 1 billion in a matter of weeks. They have since crashed, but are still more expensive than the pumpkin. Edibles are heavily hoarded due to the ease at which they can be manipulated so this sudden rise in price was most likely due to players 'buying them out'.