Why anyone hasn't done this yet is beyond me.

Sold for a Circling TF Logo Defiant Spartan(18 Keys with Overpay, Outlier)

http://backpack.tf/profiles/76561198127555665?time=1425884400 -> http://backpack.tf/profiles/76561198127555665?time=1426316400

Sold for an Australium Pro KS SMG(12 Keys with Overpay)

http://backpack.tf/profiles/76561198127555665?time=1426533169 -> http://backpack.tf/profiles/76561198127555665?time=1426662000

Sold for a Nuts & Bolts Doctor's Sack(12 Keys with Overpay) and ~5 Keys in Sweets(17 Keys total)(B/O was 15)

http://backpack.tf/profiles/76561198116080754?time=1427180400 -> http://backpack.tf/profiles/76561198116080754?time=1427266800

http://www.tf2outpost.com/trade/25466971

Sold for a Smoking Rimmed Raincatcher(~9 Keys with Overpay) and a Vintage Lugermorph(6 Keys)(15 Keys total)

http://backpack.tf/profiles/76561198128367831?time=1433660400 -> http://backpack.tf/profiles/76561198128367831?time=1433746800

Sold for a Steaming Helmet Without a Home(12 Keys with Overpay)

http://backpack.tf/profiles/76561198169076064?time=1426921200 -> http://backpack.tf/profiles/76561198169076064?time=1427007600

*This sale involves a marked scammer, and the HWAH is outdated. It's a supportive sale.

Australium Pro KS SMG mini suggestion

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

$34.85

$33.40

$35.07

$48.74

$46.00

$33.52

$25.81

$29.99

$33.91

$34.21

$39.99

$45.01

$34.62

$41.40

$36.00

$32.92

$32.92

$39.30

$37.28

$34.50

$38.44

$34.17

$25.00

$28.20

$28.21

$28.45

$23.00

$30.91

$31.71

$31.89

$31.99

$35.00

$32.00

$29.27

$34.49

$26.95

$27.48

$27.48

$35.00

$36.59

$28.58

$37.24

$38.88

$21.68

$21.68

$35.60

$27.41

$31.51

$37.82

$35.89

$35.40

$35.00

$34.50

$34.92

$35.49

$36.45

$40.87

$41.56

$32.03

$25.75

$25.75

$25.40

$17.25

$25.66

$25.66

$29.99

$31.92

$28.73

$31.00

The average comes out at $32.68(Roughly 13 Keys)

18 Seems high. The other sales seem to fit, 12-15 Keys should be fine.

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