Cones.

They're weird.

Sold for a Screaming Tiger Deep Fried Desire(46.5 Keys), a Green Energy Bonk Helm(42.5 Keys), and a Smoking Jumper's Jeepcap(~13 Keys)*(~102 Keys total)(B/O was 90)

http://backpack.tf/profiles/76561198085957719#!/compare/1462665600/1462752000

http://www.tf2outpost.com/trade/28132987

*Outdated, but any kind of mini would cap this sale anyways.

Sold for 43 Keys, an Australium Pro KS Grenade Launcher(28 Keys), and ~6 Keys in Sweets(77 Keys total)

http://backpack.tf/profiles/76561198132238778#!/compare/1455955200/1456300800

Sold for an Eerie Orbiting Fire Executioner(90 Keys) and a Strange Pro KS Thunderbolt Sniper Rifle(~40?)((B/O was 90)

http://backpack.tf/profiles/76561198075617654#!/compare/1457078400/1457424000

http://www.tf2outpost.com/trade/27919936

Sold for an Australium Rocket Launcher(~58 Keys at the time, Outlier)

http://backpack.tf/profiles/76561198204916723#!/compare/1457510400/1457683200

Sold for a Time Warp Le Party Phantom(78 Keys) and 3 Keys(81 Keys total)

http://backpack.tf/profiles/76561198025263283#!/compare/1461456000/1461542400

Sold for an Orbiting Fire Brotherhood of Arms(85 Keys) and a Max's Severed head(29.5 Keys at the time, rounding to 30)(105 Keys total)(B/O was 86)

http://backpack.tf/profiles/76561198153402711#!/compare/1462665600/1462752000

http://www.tf2outpost.com/trade/28110082

Sales seem to fit, 77-90 Keys should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.