I visited Pandora about 6 months after it opened and was super disappointed they didn't have pressed pennies.
I asked a cast member in Windtraders about it and he actually had the gall to tell me that there were no pressed pennies because "the Na'vi don't believe in money." He was working the line to customize your own banshee at the time, so I asked him what the Na'vi would think about him selling their precious banshees for $65 a pop.
He told me to have a magical day and turned his back to me. I thought it was hilarious.
I guess the Na'vi had a change of heart...