Didn't expect this many sales.

Sold for 28 Keys

http://backpack.tf/profiles/76561198046198533?time=1439881200

http://backpack.tf/profiles/76561198046198533?time=1440399600

http://backpack.tf/profiles/76561198052367336?time=1440226800

http://backpack.tf/profiles/76561198052367336?time=1440399600

Sold for an Australium Pro KS Knife(31 Keys with Overpay)

http://backpack.tf/profiles/76561198046198533?time=1440918000

http://backpack.tf/profiles/76561198046198533?time=1441004400

http://www.tf2outpost.com/item/440,4067103161,30037,5 Stovepipe History

Sold for 35 Keys

http://backpack.tf/profiles/76561198012642802?time=1441090800

http://backpack.tf/profiles/76561198012642802?time=1441177200

http://backpack.tf/profiles/76561198138913274?time=1441090800

http://backpack.tf/profiles/76561198138913274?time=1441177200

Sold for a Circling TF Logo Towering Pillar of Hats(37 Keys with Overpay)

http://backpack.tf/profiles/76561198125124032?time=1438930800

http://backpack.tf/profiles/76561198125124032?time=1439017200

http://www.tf2outpost.com/item/440,4017624626,135,5 Pillar History

Sold for a Kill-a-Watt Soldered Sensei(22 Keys with Overpay) and 9 Keys(31 Keys total)

http://backpack.tf/profiles/76561198165490152?time=1442732400

http://backpack.tf/profiles/76561198165490152?time=1442818800

Sold for 29 Keys

http://backpack.tf/profiles/76561198165490152?time=1439535600

http://backpack.tf/profiles/76561198165490152?time=1439622000

Australium Pro KS Knife mini suggestion

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

$92.73

$90.00

$89.31

$65.09

$75.90

$97.88

$78.09

$84.75

$80.50

$90.00

The average comes out at $84.42(Roughly 34 Keys)

Sales seem to fit, 28-37 Keys should be fine.

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