Sale 1

Sold for dead pres el jefe - 44-49 keys (47.5) * 0.9 = 43 keys

Seller before http://backpack.tf/profiles/76561198122486815?time=1427526000

Seller after http://backpack.tf/profiles/76561198122486815?time=1427612400

Buyer before http://backpack.tf/profiles/76561198066311459?time=1427439600

Buyer after http://backpack.tf/profiles/76561198066311459?time=1427612400

Sale 2

Can't track. Scm maybe.

Seller before http://backpack.tf/profiles/76561198122486815?time=1427353200

Seller after http://backpack.tf/profiles/76561198002834788?time=1427439600

Buyer before http://backpack.tf/profiles/76561198122486815?time=1427353200

Buyer after http://backpack.tf/profiles/76561198122486815?time=1427439600

Sale 3

Sold for Vivid Plasma Dead Cone 24-26 keys = 25 * 0.9 = 23 keys

Seller before http://backpack.tf/profiles/76561198152362262?time=1426834800

Seller after http://backpack.tf/profiles/76561198152362262?time=1426921200

Buyer before http://backpack.tf/profiles/76561198002834788?time=1426834800

Buyer after http://backpack.tf/profiles/76561198002834788?time=1426921200

Sale 4

Sold/offered for Amaranthine Pugilist's Protector = 17 keys

Seller before http://backpack.tf/profiles/76561198060713398?time=1425542400

Seller after http://backpack.tf/profiles/76561198060713398?time=1425628800

Buyer before http://backpack.tf/profiles/76561198152362262?time=1425542400

Buyer after http://backpack.tf/profiles/76561198152362262?time=1425715200

Sale 5

Sold for haunted ghosts gatsby (21-23 keys) and a specialized killstreak awper kit (~2 keys) * 0.9 = 22 keys

http://www.tf2outpost.com/trade/25195821

Seller before http://backpack.tf/profiles/76561198047239660?time=1425110400

Seller after http://backpack.tf/profiles/76561198047239660?time=1425196800

Buyer before http://backpack.tf/profiles/76561198060713398?time=1425196800

Buyer after http://backpack.tf/profiles/76561198060713398?time=1425283200

Overall, 43 seems like an outlier. Not sure about 17 so using 17-23 as final range but let me know if I should leave it out. Any comments/feedback appreciated.