I have the other three reward items, but am just now beginning to play factions, so I'm unlikely to earn the proof of waves before the event ends. If anyone has an extra, I'd like to buy one.
IGN: Gaelwyn of Elisara
***mod edit: http://wiki.guildwars.com/wiki/Proof_of_Waves "This item cannot be traded or sold."--closing thread as this item can NOT be traded or purchased.---mod edit***
WTB Proof of Waves
Astraeos