7 months old price, 2 on the market right now.

Notable offers:

First owner: http://www.tf2outpost.com/trade/13415839 No B/O

- 1.5 buds by Masquerade of Red Death, 4 days ago. The offer was hidden by the owner.

Second owner: http://www.tf2outpost.com/trade/13064429 B/O: 2 buds or 44 keys

- Massed Noble Amassment of Hats (~ 1.53 buds with unusual overpay) by Mudkip!?, 2 weeks ago. The offer was rejected by the owner.

- 1 bud and 10 keys (~ 1.45 buds) by Funkmaster Flex, 2 weeks ago. The offer was rejected by the owner.

- Strange Festive Rocket Launcher ( ~ 1.7 buds) by Þ¥Я¤NiiX, 4 days ago. The offer was rejected by the owner.

- 40 keys (~ 1.8 buds) by Pigii, 2 days ago. The offer was rejected by the owner.

- Circling Heart Pencil Pusher (~ 1.53 buds with unusual overpay) by Mudkip!?, 1 day ago. The offer was rejected by the owner.

- Stormy Storm Attendant (~ 1.7 buds with unusual overpay) and 0.5 buds pure ~ 2.2 buds by sausage.ez, 1 day ago. The offer was rejected by the owner.

I'm not sure about the value of this Attendant since this hat was nerfed after the last update, so being conservative I put the pure offer of 1.8 buds as highest offer until now.