The Marketplace is where Daybreak sells items using its virtual currency in EverQuest and EverQuest II (and formerly Free Realms). This currency was formerly called Station Cash during Sony's dominion. It is now called Daybreak Cash. For US customers, 100 DB = $1.00 USD.
To access the Marketplace, click the "DB" button, select Marketplace on the EQ/EQII Menu, or type /marketplace in your chat window.
The Marketplace first went live in December 2008.