1 of 1 in the world.

Found 4-5 sales:

Sold in part of a bulk deal for a Burning Napper's:

http://www.tf2outpost.com/trade/26147811

Seller's bp before: http://backpack.tf/profiles/76561198071534311?time=1433660400

Seller's bp after: http://backpack.tf/profiles/76561198071534311?time=1433833200

Too complex,not using

Sold for 25 pure keys:

http://www.tf2outpost.com/trade/26148938

Seller's bp before: http://backpack.tf/id/cooper1677?time=1433660400 - 32 pure keys

Seller's bp after: http://backpack.tf/id/cooper1677?time=1433746800 - 62 pure keys

http://puu.sh/iYTKF/2b9776f7bf.jpg

Also re-sold for ~~25 keys in mixed http://puu.sh/iYTP4/296aa51d7f.jpg

My sale:

Went on a trade server,got offered an Orbiting Fire Chieftain's Challenge, Steaming Prancer's Pride, Specialized Killstreak Stickybomb Launcher and a Gold Botkiller Rocket Launcher MK.II:

http://puu.sh/iYL01/144c16b5ce.jpg

Proof it's actually these effects: http://www.tf2outpost.com/trade/26470964

Mini for Orb. Fire Chieftain:

7 July: http://i.imgur.com/MZKpemk.png

Sold for Smoking Chieftain(20)+ Concealed Killer Weapons Case (~~8.30$, counting keys as ~~2.35$, makes 3,5 keys)

Chieftain(23.5)+Prancer's(10.5)+ Stickybomb Launcher(8)+ Botkiller RL. (2.3) ~~ 44. Obvious outlier,not using

Sold IMMEDIATLY for a Max's Severed Head

~~24 keys

http://puu.sh/iYQGX/0329c11773.png

http://i.imgur.com/TChQ0XA.png

Quicksale,not using as base price,but using to "support" proof

Taking,as the fixed price, 25

Credits to "Trashcan Man" for helping me with providing additionnal proof to the 2nd sale

I am fairly new to unusual price suggesting. If i make some mistakes, please forgive me and help me correct them so that i don't repeat them in the future! As always,criticism is allowed, as long as it isn't satiric.