Mass Effect Hints
Infinite Credits
Can be done anytime after saving Dr. Michel, and coming back to the Citadel.
After you do the supply drop mission from Dr. Michel she will give you a discount on the supplies she sells. However this discount works both ways as she will now buy anything you sell to her for much more than the other vendors. Now sell her as much stuff as you can, and go to Expat, you can buy back the stuff and still make a profit, keep on doing this and you will unlock the millionaire achievement.
*The first time you will lose money but ultimately you gain a ton of Credits, and it only takes about 45 min.*
Submitted By: Matt