Welp, didn't have to resuggest earlier I guess.

Sold for 40 Keys

http://backpack.tf/profiles/76561198148511293#!/compare/1466121600/1466208000

Sold for 40 Keys

http://backpack.tf/profiles/76561198009272632#!/compare/1461196800/1461283200

Sold for 50 Keys

http://backpack.tf/profiles/76561197995426014#!/compare/1460419200/1460592000

http://backpack.tf/profiles/76561198112281935#!/compare/1460332800/1460419200

Sold for an Eldritch Flame Hellmet(66 Keys) and 1 Key(67 Keys total, Outlier)

http://backpack.tf/profiles/76561198084771087#!/compare/1460678400/1460764800

Sold for an Australium Grenade Launcher(18 Keys at the time), an Australium Pro KS Frontier Justice(~11.5 Keys), an Australium Pro KS Axtinguisher(~8 Keys) and ~8.5 Keys in Sweets(46 Keys total)

http://backpack.tf/profiles/76561197992683532#!/compare/1465603200/1465689600

Added 10 Keys for a Terror-Watt Hong Kong Cone(72.5 Keys, rounding to 73)(63 Keys total Outlier)

http://backpack.tf/profiles/76561198045195906#!/compare/1459641600/1460246400

http://backpack.tf/profiles/76561198119634686#!/compare/1460160000/1460246400

http://www.tf2outpost.com/trade/28245839 Seller at 40 Keys

Although 63-67 are really high outliers, the sales above 40 can't really be ignored. Much less if one of them is a pure sale as well.

40-50 Keys should be fine.

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