Bukkit

What is the enhancement in mind? How should it look and feel?
Add 3 indicators/blocks in the bottom that can be configured to a value.
Could be 10$, 50$, and 100$.
To add money to the trade left click, to subtract right click.
Then a gold block in the middle to see how much one player wants to trade like the accept button.
(Player1: 10$
Player2: 250$)

Would be really cool! :)