I love the Front Runner, but I wouldn't pay more than 1.5 for this.

Sold for an Australium Minigun(1.9 with Overpay)

http://backpack.tf/profiles/76561198119534537?time=1415433600 -> http://backpack.tf/profiles/76561198119534537?time=1415520000

Added 8 Keys for a Sunbeams Bombing Run(2.4 with Overpay)(1.9 Total)

http://backpack.tf/profiles/76561198101210182?time=1417852800 -> http://backpack.tf/profiles/76561198101210182?time=1417972125

http://www.tf2outpost.com/item/440,3264599493,760,5 Front History

Sold for a Terror-Watt Ye Olde Baker Boy(2 with Overpay)

http://backpack.tf/profiles/76561198131620766?time=1420746485 -> http://backpack.tf/profiles/76561198131620766?time=1420790400

Sold for a Miami Nights Das Naggenvatcher(1.9 with Overpay) + ~1 Key in Sweets(2 Total)

http://backpack.tf/profiles/76561198115669582?time=1417912321 -> http://backpack.tf/profiles/76561198115669582?time=1418457600

Sold for a Bubbling Thirst Blood(1.9 with Overpay)

http://backpack.tf/profiles/76561198042136168?time=1420704000 -> http://backpack.tf/profiles/76561198042136168?time=1420790400

Sold for two Australium Pro KS Force-a-Natures(28 Keys with Overpay not counting Killstreak, B/O was 1.6)

http://www.tf2outpost.com/trade/24160038

Sold for 7 Keys + ~12 Keys(11 with Overpay) in Items(18 Keys Total)(1.2)

http://backpack.tf/profiles/76561198077870952?time=1419148800 -> http://backpack.tf/profiles/76561198077870952?time=1419612248

http://backpack.tf/profiles/76561198094114508?time=1419171954

http://www.tf2outpost.com/trade/24212860

Sold for 26 Keys(1.8)

http://backpack.tf/profiles/76561198068715047?time=1413874800 -> http://backpack.tf/profiles/76561198068715047?time=1413961200

http://www.tf2outpost.com/trade/23211893

Sold for 23 Keys(1.6)

http://backpack.tf/profiles/76561198129925519?time=1415433600 -> http://backpack.tf/profiles/76561198129925519?time=1416391376

http://www.tf2outpost.com/trade/23789016

Sold for 26 Keys(1.8)

http://backpack.tf/profiles/76561198043491132?time=1418609363 -> http://backpack.tf/profiles/76561198043491132?time=1418630400

Added 11 Keys for an Aces High Backwards Ballcap(2.7 with Overpay)(1.9 Total)

http://backpack.tf/profiles/76561198118260728?time=1419505496 -> http://backpack.tf/profiles/76561198118260728?time=1419667200

http://backpack.tf/profiles/76561198095576590?time=1419494400

http://www.tf2outpost.com/trade/24092555

1.2 is too low clearly. With sales all-around, the range seems to be balanced. 1.6-2 should be fine.

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