Nearly everything found in the game, including gold, can be exchanged with other players directly or through the auction house system. So say you’re a witch doctor and you’ve just found an incredibly rare, incredibly powerful axe that only barbarians can use. In the previous Diablo games your best option might have been to sell the axe to an in-game vendor, but in Diablo III, you now have the ability to list that axe in the auction house for your fellow barbarian players to bid on. And you know another player will probably appreciate the true value of that axe more than some heartless vendor who’ll likely just melt it down for scrap…
Will I need to be connected to the Internet to play Diablo III?
Yes, players must be online in order to play Diablo III. Diablo III was built from the ground up to take full advantage of the new version of Blizzard’s powerful Battle.net platform.
Players will have access to several features through Battle.net, including an advanced achievement system as well as the Diablo III banner system; a powerful co-op and PvP matchmaking system; comprehensive stat-tracking; persistent characters that will not expire and are accessible from any computer that has Diablo III installed; a persistent Real ID friends list across multiple Blizzard games, along with cross-game chat; a shared stash accessible by all Diablo III characters on the Battle.net account; and the ability to have friends seamlessly jump in and join you at any time during your quest against the Burning Hells. Together with the security-related benefits that Battle.net provides, these Battle.net-based features are integral to the Diablo III game experience.