Dark Souls: Prepare To Die Edition [Online Game Code] not available.

[Former user]

Shows up on CS as a $7.49 download, after clicking on the link Amazon says its unavailable.

[ArmoredCavalry]

In this case, this is due to the game being temporarily out of keys.

If a game stays unavailable for too long, it will be automatically pulled from the system.

So, everything seems to be working as intended.