After defeating the Drow dark elf in Act 2, talk to the Dwarf in the cellar. Then, recall to town and immediately save the game. Talk to the another dwarf other than the one where you can buy and sell. He will thank you and give you 2000 experience and 3000 gold. Save this as a new game. Load the old game and import your character from the new game. Repeat this as many times as desired.