Someone had to do it.

Sold for a Disco Beat Down Heavy Duty Rag(24 Keys with Overpay)

http://backpack.tf/profiles/76561198073143375?time=1434186909 -> http://backpack.tf/profiles/76561198073143375?time=1434265200

Sold for an Australium Spec KS Black Box(~20 Keys, offered)

http://backpack.tf/profiles/76561198110108956?time=1430895600 -> http://backpack.tf/profiles/76561198110108956?time=1431154800

http://www.tf2outpost.com/trade/25770121

Sold for a Cauldron Bubbles Pugilist Protector(~14 Keys with Overpay) and a Nuts & Bolts Milkman(11 Keys with Overpay)(25 Keys total)

http://backpack.tf/profiles/76561198073143375?time=1432537200 -> http://backpack.tf/profiles/76561198073143375?time=1432882800

Sold for a Circling Peace Sign Noble Amassment of Hats(20 Keys with Overpay)

http://backpack.tf/profiles/76561198151960405?time=1433487600 -> http://backpack.tf/profiles/76561198151960405?time=1433746800

Sold for an Australium Spec KS Flame Thrower(~15 Keys with Overpay at the time) and an Australium Pro KS Axtinguisher(~8 Keys with Overpay)(~23 Keys total)

http://backpack.tf/profiles/76561198061868749?time=1428735600 -> http://backpack.tf/profiles/76561198061868749?time=1428908400

Australium Pro KS Axtinguisher mini suggestion

All recent sales on the SCM(Keys = $2.49): http://steamcommunity.com/market/listings/440/Strange%20Professional%20Killstreak%20Australium%20Axtinguisher

$19.37

$24.29

$20.26

$24.90

$22.98

$17.24

$20.69

$21.85

$22.80

$24.54

$23.00

$23.00

$28.75

$28.51

$23.00

$20.83

$23.01

$21.99

$21.99

$22.59

$24.07

$18.40

$21.80

$21.85

$24.79

The average comes out at $21.66(Roughly 8.5 Keys)

Sales seem to fit, 20-25 Keys should be fine.

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