Sale #1:

http://www.tf2outpost.com/trade/26105252

Sold with 25 keys for a Sunbeams Towering (165)

Seller:

http://backpack.tf/profiles/76561198159649904?time=1433314800 (June 3rd)

http://backpack.tf/profiles/76561198159649904?time=1433487600 (June 5th)

Buyer:

http://backpack.tf/profiles/76561198068986721?time=1430031600 (April 26th)

http://backpack.tf/profiles/76561198068986721?time=1433314800 (June 3rd)

Towering: http://www.tf2outpost.com/trade/26020365

(165 * 0.9) - 25 = 123.5; rounded to 125 keys

Sale #2:

Sold for a Gifted D@D Spartan (probably well under 100 lol)

http://backpack.tf/profiles/76561198159649904?time=1432969200 (May 30th)

http://backpack.tf/profiles/76561198159649904?time=1433142000 (June 1st)

Sale #3:

http://www.tf2outpost.com/trade/26169925

Sold for Roboactive Lucky Shot (90) + Misty Football Helmet (35)

http://backpack.tf/profiles/76561198136073089?time=1434438000 (June 16th)

http://backpack.tf/profiles/76561198136073089?time=1434697200 (June 19th)

(90 + 35) * 0.9 = 112.5; rounded to 110 keys

Sale #4:

http://www.tf2outpost.com/trade/25988012

Sold for Harvest Cowl (96) + Duped Misty Yellow Belt (97)

http://backpack.tf/profiles/76561198053966696?time=1432278000 (May 22nd)

http://backpack.tf/profiles/76561198053966696?time=1432450800 (May 24th)

(96 + 97) * 0.9 = 173.7; rounded to 175 keys

Oldest sale here and definitely seems high. This should be excluded from the range.

Sunbeams Towering:

http://backpack.tf/vote/id/55a88e84b98d88ad3b8b457f

Roboactive Lucky Shot:

http://backpack.tf/vote/id/559e9a76b98d8856348b4596

Mini for Cowl and Yellow Belt:

http://backpack.tf/vote/id/557df381ba8d88f10d8b457b The value for the Cowl is excluding the Executioner sale