Lol 20 Keys.

smoking = haunted ghosts

Sold for an Orbiting Planets Counterfeit Billycock(8 Keys with Overpay) and 1 Key(9 Keys total, Outlier)

http://backpack.tf/profiles/76561198120768380?time=1428390000 -> http://backpack.tf/profiles/76561198120768380?time=1428649200

Sold for a Kill-a-Watt Birdcage(17 Keys with Overpay, Outlier)

http://backpack.tf/profiles/76561198120768380?time=1428708227 -> http://backpack.tf/profiles/76561198120768380?time=1428735600

Sold for a Strange Pro KS Rocket Launcher(12 Keys with Overpay)

http://backpack.tf/profiles/76561198172573626?time=1430974497 -> http://backpack.tf/profiles/76561198172573626?time=1430982000

Sold for an Orbiting Fire Prince Tavish's Crown(12 Keys with Overpay)

http://backpack.tf/profiles/76561198112463265?time=1425283200 -> http://backpack.tf/profiles/76561198112463265?time=1426057200

Sold with 1 Bud(6 Keys at the time) for an Australium Grenade Launcher(17 Keys with Overpay at the time)(11 Keys total)

http://backpack.tf/profiles/76561198031674387?time=1428472269 -> http://backpack.tf/profiles/76561198031674387?time=1428562800

Sold for ~13 Keys in Items(~12 Keys with Overpay)

http://backpack.tf/profiles/76561198133145675?time=1430290800 -> http://backpack.tf/profiles/76561198133145675?time=1430377200

Strange Pro KS Rocket Launcher mini suggestion

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

$34.50

$36.28

$33.00

$26.44

$34.50

$46.00

$27.96

$27.96

$23.00

$26.17

$31.71

$28.32

$28.75

$34.11

$34.05

$34.50

$34.10

$30.09

$33.35

$33.95

$34.20

$34.20

$33.35

$27.74

$31.87

$31.98

$31.06

$31.99

The average comes out at $31.96(Roughly 13 Keys)

As 9 Keys is low, 17 Keys is high. 11-12 Keys should be fine.

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