I know I own one but don't downgrade because of that. I got this unusual and saw it was unpriced so I decided to do some research and suggest a price :)

Solds:

1. Had no tf2outpost trade but he has traded it for my Butterfly Knife | Crimson Web (FT) (worth 150$) with a Gut Knife | Slaughter (FT) added from his side (valued at 70$). I was looking on 100+ in unusual offers and I thought that this unusual is valued at about 70 keys (because of the offers the other sellers got) I can't link to bp.tf because it's not showing the exact info and miss some days in the cs:go inventory (apparently in mine AND the buyer of my knife) but because I was involved in that trade I can leave a screenshot of the trade

Here is the screenshot: http://i.imgur.com/rPTei6f.png

2. http://www.tf2outpost.com/trade/26338804 - Sold for a lot of pyro stuff and sweets (valued at ~75-80 keys)

http://backpack.tf/profiles/76561198043971132?time=1436684400 - Here as you can see, the Tyrantium is his only unusual

http://backpack.tf/profiles/76561198043971132?time=1436770800 - Here, he got the new Time Wrap Firewall Helmet (valued at ~40 keys), a new Strange Pro Degreaser, a Strange Pro Flare Gun, Strange Pro Powerjack, earbuds and a few more stuff

3. http://www.tf2outpost.com/trade/26275045 - Sold for a Burning Flames Glengarry Bonnet + about 4 keys in sweets (74 keys total).

The inventory history time is missing but I believe the V in the outpost trade means they accepted it

Unsolds:

1. My trade - http://www.tf2outpost.com/trade/26657391

I just got it yesterday and had 2 offers (1 person added me and 1 I found in a server so I can't prove it) of 70+ keys in unusuals. But I declined both because I didn't like any of the unusuals they offered me

2. http://www.tf2outpost.com/trade/26546232 - The other seller, a bit less than 2 weeks old. 3 offers can be found in the trade link

Had an offer of unusual SMG (didn't give detailed info but unusual weapons are valued at ~60-80 keys because they are new)

He also had an offer of a gifted Blizzardy Storm Team Captain (valued at 77.5 keys now). Problem is it's gifted so it's worth less but meh

And last offer he had is a Purple Energy Jeepcap (valued at 40 keys) but the seller himself said this is very low and he is looking for more