EVENT SUGGESTION!

Sale 1: https://backpack.tf/profiles/76561198051046601#!/compare/1494547200/1494633600 - 10 pure + 1 in adds (11 keys)

Sale 2: https://backpack.tf/profiles/76561198093780775#!/compare/1494720000/1495497600 - 12 pure, took 7 days.

Sale 3: https://backpack.tf/profiles/76561198072010135#!/compare/1494979200/1495324800

Sold with Strange Professional Killstreak Australium Force-A-Nature (12 keys) for a Clean Blizzardy Storm Master's Yellow Belt (23 keys)

23 - 12 = 11

Sale 4: https://backpack.tf/profiles/76561198042674879#!/compare/1495411200/1495497600 - 11,5 pure.

Sale 5: https://backpack.tf/profiles/76561198255903931#!/compare/1495497600/1495584000

Sold for Strange Specialized Killstreak Australium Stickybomb Launcher (11 keys)

Sale 6: https://backpack.tf/profiles/76561198101471399#!/compare/1495584000/1495670400

Sold for a Clean Tesla Coil Helmet Without a Home (19 keys)

B/O at 16: http://www.tf2outpost.com/trade/29197172

Sale 7: https://backpack.tf/profiles/76561198050197875#!/compare/1495238400/1496275200 - 10,5 pure.

Sale 8: https://backpack.tf/profiles/76561198045232326#!/compare/1496534400/1496620800 - 13 pure.

Sale 9: https://backpack.tf/profiles/76561198194886791#!/compare/1498176000/1498262400 - 10 pure.

Sale 10: https://backpack.tf/profiles/76561198048008254#!/compare/1498780800/1498867200 - 12 pure.

This thing quicksells for 10-11, like nothing. 11 days at 15: http://i.imgur.com/0sCn7ij.png. 12 and 13 are rare + one 12 took a week. A range of 12-16 should do fine.