You might think that Diablo III is an online game, definitely not an MMO like WoW but definitely an online.
So why the hell Blizzard use your computer’s system clock to determine Auction House transactions!!! Is this a single-player game where duping doesn’t matter? Why do some Korean players have 4 billion gold, yes, that is Billion, not million?
So how do you dupe items? Well, it’s easy. You sell something, you go back and cancel it. Duping complete.
Note that abusing this to dupe items will probably result in a ban from Blizzard. Sending 100M to your other account might work but I don’t encourage it. I’m just appalled at Blizzard’s stupidity – who programmed the damned local clock, with the foresight that this will allow duping 250 euro crossbows?