Well, Id o not know the prices this is just like a guess, but say Super Strength (4) are 1,020 GP each, you buy 10 of them. that is 10,200 GP. Then you go Decant them to Super Strength (2), you now have 20 of them, and let's say they are 515 each, well then that is 10,300, so it is small easy profit. Not sure if that is right, but just an example.