I've only used this method once and it has worked. It probably only works once so yeah~
Essentially, you are trying to make it seem as if you got `hacked`.
Blizzard will then roll-back your account to a previous state (generally a day) so you get your HC character back.
- Don't login for a couple of hours after your death
- Download Hotspot Shield - here or any other proxy; this is a proxy which can be used to change your `location` to a different country in order to simulate the fact that it isn't `you`.
- Once Hotspot Shield/your desired proxy is up and running, login and delete ALL your Diablo characters
- Remove Hotspot Shield/your desired proxy
- Wait a couple of hours and log back in to Diablo
- Submit a support ticket on the Blizzard website claiming you were `hacked` and that you wish for a roll-back
I take no responsibility for any loss in characters/items, etc.
Use this at your own risk.
Note: For D3 rollbacks, 2+ rollbacks will result in disabling of the use of RMAH.
Finally, on a side note, if you are using the RMAH and you have gotten paid, you can actually get the item you sold back AND keep the money. (Just something I found when using this method).