After perusing the suggestion on buffs, it seems everyone is attempting to find a way to get rid of their unwanted buffs but we haven't came up with a good solution that Ender has deemed decent enough to comment on.
This is why I am suggesting the option to sale back your unwanted buffs. With this option Ender can devise a formula based on the amount left on your unwanted buff you wish to sale back that would be fair. I obviously believe there should be a "penalty" so to speak when selling them back, and you shouldn't get 100% of what you have left on your buff back in trophy points.
With this option though you can't circumvent the 1 buff a day rule, because even if you purchase the wrong one, sale it back, you're still forced to wait until the next day before you can purchase another buff.