This item deserves a generous bump, if what I discovered in this trade indicates. Please note that this is a 1 of 6 hat with an effect that makes it a collector's item, the last price was 5 months ago, and as usual, all prices are according to this website.

An offer for a Vivid Plasma Tyrant's Helm (2.7-3.5 buds) has vested interest with the seller, but apparently something got lost in translation and the buyer did not respond back. A hidden offer is located for 2 buds 16 keys, or 2.6 buds. He additionally states that he has an offer for 2.5 buds pure.