Sale #1

Sold for Hot Night Terror Scattergun MW

http://backpack.tf/profiles/76561198066569256#!/compare/1464998400/1465516800

Used to price the scatter

Sale #2

Sold for 39 keys

http://backpack.tf/profiles/76561198066569256#!/compare/1465862400/1466121600

Sale #3

Sold for C9 HWNN + Miami Bear

http://backpack.tf/profiles/76561197993973622#!/compare/1466467200/1466985600

65 + 32 = 97 keys

Sale #4

Sold with ~70 keys in items for Stormy Storm HKC

http://backpack.tf/profiles/76561197993973622#!/compare/1467158400/1467331200

Bulk, but supports the drop

Sale #5

Sold for MG Desert Marauder + Bubbling Head Warmer + 10 keys

http://backpack.tf/profiles/76561198057229334#!/compare/1464652800/1464739200

67.5 + 17 + 10 = 94.5, rounding to 95 keys

Sale #6

Sold for CH Flipped Trilby + 26 keys + Collector's Spy-cicle

http://backpack.tf/profiles/76561198120382814#!/compare/1465430400/1465516800

47.5 + 26 + 5 = 78.5, rounding to 80 keys

Trilby

http://backpack.tf/suggestion/57744943c440453966662a38

47.5

Sale #7

Sold with 49 keys in items for Strange Catastrophic Companions

http://backpack.tf/profiles/76561198147423168#!/compare/1467244800/1467331200

100 - 49 = 51 keys

Sale #8

Sold for MG Festivizer + duped Miami Baker

http://backpack.tf/profiles/76561198176125115#!/compare/1467763200/1467849600

50 + 25 = 75 keys

Baker Boy

Sold for GF Whoopee + Genuine Pro Ks Three-Rune Blade + Vintage Spec Ks Luger

http://backpack.tf/profiles/76561198136910509#!/compare/1464220800/1464739200

17 + 3.5 + 4.5 = 25

Whoopee

http://imgur.com/a/3Z15L

17

Sale #9

Sold for Harvest Moon Gentleman's Gatsby + 25 keys

http://backpack.tf/profiles/76561198181440027#!/compare/1467849600/1467936000

75 + 25 = 90 keys

Conclusion

Sales at 39, 51, 75, 80, 90, 95, 97

2 months and 10 days unsold at 85 keys

http://imgur.com/a/fBdTA

So taking the 2 lowest sales as outliers and capping the high end at the current unsolds

Final price: 75 - 85