Counter, range is needed.

Sold with ~6 Keys in Sweets for a Strange Pro KS Machina(14 Keys with Overpay)(8 Keys total)

http://backpack.tf/profiles/76561198133532745?time=1427620895 -> http://backpack.tf/profiles/76561198133532745?time=1428217200

Sold with a Strange Huntsman(~4 Keys) for an Aces High Tyrantium Helmet(14 Keys with Overpay)(10 Keys total)

http://backpack.tf/profiles/76561198079636485?time=1428130800 -> http://backpack.tf/profiles/76561198079636485?time=1428217200

Quicksold for 8 Keys(Sold in a day)

http://backpack.tf/profiles/76561197996661907?time=1430463600 -> http://backpack.tf/profiles/76561197996661907?time=1430636400

http://www.tf2outpost.com/trade/25848291

Strange Pro KS Machina mini suggestion

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

$33.92

$33.92

$34.80

$39.42

$40.38

$42.00

$41.38

$42.87

$42.90

$47.93

$38.93

$34.48

$34.29

$30.91

$19.49

$38.99

$45.63

$45.63

$45.63

$38.48

$39.99

$41.80

$42.16

$42.16

$41.50

$41.53

$41.92

$41.83

$35.00

$119.99

$40.22

$30.97

$34.49

$32.83

$34.50

$28.72

$28.75

$28.91

$39.99

$34.50

$34.99

$32.84

$35.01

$32.86

$46.00

$27.84

$48.29

$40.10

$39.99

$31.50

$32.43

$34.79

$49.19

$43.55

$42.68

$35.79

The average comes out at $39.31(Roughly 16 Keys)

Sellers at 15:

http://www.tf2outpost.com/trade/25861725

http://www.tf2outpost.com/trade/25870099

Taking 15-16.

8 May be low, but it's common. 8-10 Keys should be fine.

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