Yes I have one. 2 Month old price. I realized that there is a huge price range considering the price for this hat. 21-34 keys? There's more than a 10 key difference between high and low range! I'm wasn't really sure whether or not I was making the price go up or go down when I made this, but YOLO. Here's the proof:

http://www.tf2outpost.com/trade/10913328

B/O of 2 Buds

Shilohϟ: Offered Orb. Fire Medic's Mountain Cap. 21 Keys with overpay, rejected (Goes to show no one's really selling this for 21 keys.)

lGMlArs: Offered a Bud (24.5). The owner did not accept nor respond.

Killswitch0078: Offered a Bud + Sweets, the owned added him to see the sweets. I suppose it was insufficient since the owner still has the Hermes.

http://www.tf2outpost.com/trade/11122229

une// Zamonto V&D: Offered a wrapped clean Voo-Doo Juju. Insta-reject.

taigha [Birthday]: Offered White Bills (10 Keys) + Summer Shades (4 Keys) + S. Grenade Launcher (4 Keys) + 3 keys totaling to 21 keys. Just goes to show this doesn't sell for 21 keys!

★SSK★jamestar: Offered a Bubbling Honcho's Headgear. 29.24 keys (26.95 keys with Overpay.) Also rejected

Pets: I wouldn't really use this as proof since its a special level Vintage but I suppose I will for the sake of the suggestion. Offered a level 99 Vintage Procedure Mask. 23.5 Keys on backpack.tf (http://backpack.tf/profiles/76561197997541046). No response from owner since its a pretty new offer.

http://www.tf2outpost.com/trade/10928687

C/O's include 25 keys and 30 keys. B/O is 33 keys. I guess he's determined to get his B/O since both offers are in pure and above the average price of the Hermes at the moment.

http://www.tf2outpost.com/trade/10725091

C/O of Smoking Hermes + 2 Ref. If you use the average of both prices with keys being 5.33, then the guy is slightly more than 1 rec down, not including Unusual overpay.

http://www.tf2outpost.com/trade/10510164

B/O of 32 Keys. C/O was 1 Bud + Untradeable Voodoo Juju (30~ish in items)

http://www.tf2outpost.com/trade/11314628

B/O of 28 keys. Sold for his B/O according to our conversation:

Resi ♥: Hello

☆Highly Intoxicated Muffiη☆: Thanks lol

He thinks its a quicksell price. Maybe, maybe not since he didn't provide any proof of it being too much of a quicksell.

http://www.tf2outpost.com/trade/11582786

Sold for Voodoo Juju (Clean and Lime)(18.4 Keys w/ overpay) + 7 Keys + Mecha-Medes + 1 Ref. According to this conversation:

Zombiekillenfol: Hello

☆Highly Intoxicated Muffiη☆: Alright (I need to learn how to spell lol)

So, all in all. I just don't really understand where 34 and 21 is coming from. People have B/O's of 32 and 33. So I can say fairly that you can't expect 34 keys from this hat. I avoided the trades more than a month old here. 25 keys (lowest pure C/O) and 32 keys (Highest B/O that was sold)

May or may not be edited further in the future.