Using this technique is GUARANTEED to increase your e-peen by at least 4 inches and the amount of sex you get in real life by 74%. In fact, I met my wife by using this method.
Most I've got is about 3.5G an hour, from selling the stuff from slaughtering Ettin's for about 50c each, and getting a few hundred copper ore alongside the corrupted Oakheart event a few times.
depending on the current price on the TP 400-600 copper ore = 1G
Enjoy!