This one took a while.

Sold for a Burning Flames Thirst Blood(93 Keys with Overpay)

http://backpack.tf/profiles/76561198108606831?time=1440140400 (August 21st)

http://backpack.tf/profiles/76561198108606831?time=1440226800 (August 22nd)

http://www.tf2outpost.com/trade/26795090

Sold for 70 Keys*

http://backpack.tf/profiles/76561198105299937?time=1440918000 (August 30th)

http://backpack.tf/profiles/76561198105299937?time=1441090800 (September 1st)

http://backpack.tf/profiles/76561198108606831?time=1441004400 (August 31st)

http://backpack.tf/profiles/76561198108606831?time=1441090800 (September 1st)

*Some keys were obtained by selling a Molten Mallard Madame Dixie

Sold for a Stare From Beyond Chieftain's Challenge(58 Keys with Overpay), a Skill Gotten Gains Fresh Brewed Victory(31.5 Keys with Overpay), and ~4.5 Keys in Sweets(94 Keys total)

http://backpack.tf/profiles/76561198131563082?time=1442559600 (September 18th)

http://backpack.tf/profiles/76561198131563082?time=1442732400 (September 20th)

http://backpack.tf/profiles/76561198117777863?time=1442473200 (September 17th)

http://backpack.tf/profiles/76561198117777863?time=1442646000 (September 19th)

Sold for an Australium Pro KS Sniper Rifle(41 Keys with Overpay) and an Australium Pro KS Scattergun(37 Keys with Overpay)(78 Keys total)

http://backpack.tf/profiles/76561198076568020?time=1444978800 (October 16th)

http://backpack.tf/profiles/76561198076568020?time=1445065200 (October 17th)

http://backpack.tf/profiles/76561198209806341?time=1444978800 (October 16th)

http://backpack.tf/profiles/76561198209806341?time=1445065200 (October 17th)

Sold for 72 Keys

http://backpack.tf/profiles/76561197995263987?time=1443078000 (September 24th)

http://backpack.tf/profiles/76561197995263987?time=1443423600 (September 28th)

http://backpack.tf/profiles/76561198037143087?time=1442991600 (September 23rd)

http://backpack.tf/profiles/76561198037143087?time=1443423600 (September 28th)

http://www.tf2outpost.com/trade/26934848

http://www.tf2outpost.com/trade/26697307

Sold for a Circling Heart Defiant Spartan(36 Keys with Overpay), a Burning Flames Handyman's Handle(31 Keys with Overpay) and ~6 Keys in Sweets(73 Keys total)

http://backpack.tf/profiles/76561198060201542?time=1441522800 (September 6th)

http://backpack.tf/profiles/76561198060201542?time=1441695600 (September 8th)

http://backpack.tf/profiles/76561198082902632?time=1441436400 (September 5th)

http://backpack.tf/profiles/76561198082902632?time=1441522800 (September 6th)

Australium Pro KS Sniper Rifle mini suggestion

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

$119.90

$127.78

$114.88

$115.00

$125.40

$123.99

$90.00

$107.50

$107.50

$123.05

$133.22

$114.19

$110.01

$110.34

$107.53

The average comes out at $115.35(Roughly 46 Keys)

Australium Pro KS Scattergun mini suggestion

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

$101.40

$101.40

$101.00

$82.55

$123.72

$109.60

$103.50

$109.25

$103.71

$103.73

$104.72

$104.24

$103.50

$106.22

$99.22

$104.81

$100.60

$100.60

$105.02

$105.02

$116.17

$109.25

$101.02

$101.00

$76.09

The average comes out at $103.09(Roughly 41 Keys)

Sales seem to fit, 70-94 Keys should be fine.

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