Arena Gambling

Is it possible to add a wager option to the arena gump? I imagine it prompting a typical trade screen, but once trade is agreed upon, the items are held until the duel is finished, and whoever wins ends up with all items?

Not sure how difficult this would be to implement but as far as encouraging extra curricular stuff to break up the monotony of the hunt grind, gambling at the arena would be pretty damn fun, and a safe way to race for slips.