Sale 1

Sold for strange professional festive black box (12-15) and negligible sweets = 13.5 * 0.9 = 12 keys

Buyer before: http://backpack.tf/profiles/76561198119216883?time=1431500400 (May 13th)

Buyer after: http://backpack.tf/profiles/76561198119216883?time=1431586800 (May 14th)

• Mini on strange pro festive black box:

  Average buyer pays ~$35

  Average seller receives ~$29.75

  Scm key price ~$2.40

  35/2.40 = 15 keys

  29.75/2.40 = 12 keys

Sale 2

Sold for specialized collector's degreaser = 10 * 0.9 = 9 keys

Seller before: http://backpack.tf/profiles/76561198075392083?time=1429945200 (April 25th)

Seller after: http://backpack.tf/profiles/76561198075392083?time=1430031600 (April 26th)

• Mini for specialized collector's degreaser:

  Average buyer pays ~$26

  Average seller receives ~$22.10

  Scm key price ~$2.40

  26/2.40 = 11 keys

  22.10/2.40 = 9 keys

Sale 3

Sold for memory leak birdcage, 7 keys and negligible sweets = (14 * 0.9) + 7 = 20 keys - outlier

Seller before: http://backpack.tf/profiles/76561198085957719?time=1429772400 (April 23rd)

Seller after: http://backpack.tf/profiles/76561198085957719?time=1429858800 (April 24th)

Sale 4

Sold for 10 keys - quicksell, bought from alt of trade banned user

http://www.tf2outpost.com/user/76561197963596956

Buyer before: http://backpack.tf/profiles/76561198085957719?time=1429426800 (April 19th)

Buyer after: http://backpack.tf/profiles/76561198085957719?time=1429513200 (April 20th)

Sale 5

Sold for purple confetti glengarry bonnet = 15 * 0.9 = 14 keys

Buyer before: http://backpack.tf/profiles/76561198178825827?time=1430118000 (April 27th)

Buyer after: http://backpack.tf/profiles/76561198178825827?time=1430204400 (April 28th)

• Mini on purple fetti bonnet:

  Sold for green confetti birdcage (13-16) and 12 ref sweets = ~15 keys

  
  

  Seller before: http://backpack.tf/profiles/76561198137419571?time=1430809200 (May 5th)

  Seller after: http://backpack.tf/profiles/76561198137419571?time=1430982000 (May 7th)

Sale 5

Sold for 12 keys

Seller before: http://backpack.tf/profiles/76561198025560677?time=1429772400 (April 23rd)

Seller after: http://backpack.tf/profiles/76561198025560677?time=1429858800 (April 24th)

___________________________________________________

Sale at 20 seems like an obvious outlier. 10 key pure sale looks like an alt quickselling, and the sale at 9 seems like a low outlier to me too. Using 12-14 as final range. Feedback appreciated.