GTS Tax - Change tax so its taken after the sale, not before

[HackuJacku]

What are you trying to do?
Would like the GTS tax/fee to be taken after the sale and not at the start.

Describe the solution you'd like
GTS would tax the player once the item/Pixelmon is sold. If the item/Pixelmon is not sold, the player won't be taxed. The listing fee would be removed.

Describe alternatives you've considered
N/A

Anything else that might help?
N/A