Sale 1: Sold for Tesla Coil Federal Casemaker (76; indate) --> 76 keys

http://backpack.tf/profiles/76561198095914412#!/compare/1490745600/1490918400

Sale 2: Sold for Sunbeams A Rather Festive Tree (87; indate) --> 87 keys

http://backpack.tf/profiles/76561198049761080#!/compare/1490572800/1490659200

Sale 3: 35 keys pure?!? Obvious QS

http://backpack.tf/profiles/76561198049761080#!/compare/1490659200/1490745600

Sale 4: Sold together with Stormy Storm Combustible Kabuto (23) + Searing Plasma Toy Soldier (23) for Circling Peace Sign Tough Stuff Muffs (90) --> 44 keys

http://backpack.tf/profiles/76561198092964413#!/compare/1492300800/1492732800

Mini for Tough Stuff Muffs: http://backpack.tf/suggestion/58f7b27bc440456f52132e30

Sale 5: Sold together with Vivid Plasma Big Country (27) for duped Harvest Moon Virtual Reality Headset

http://backpack.tf/profiles/76561198334066390#!/compare/1494288000/1494374400

Mini Boug Country: http://backpack.tf/suggestion/59132513e3387710ef565339

The duped Harvest Moon Virtual Reality Headset has no useable mini so this sale can't be used.

Sales at 44, 76, 87. Calling 44 and 87 an outliers. Unsold at 65 + 1x unsold at 80 for 13 days

http://i.imgur.com/UYx3NyZ.png

Thanks to Erik for his feedback here!

Suggesting range from 65 to 75