Sold for Screaming Tiger Taunt: Buy A Life:

http://www.tf2outpost.com/trade/26730219

http://backpack.tf/profiles/76561198153203235?time=1439190000 (August 10th)

http://backpack.tf/profiles/76561198153203235?time=1439276400 (August 11th)

http://backpack.tf/profiles/76561198153203235?time=1439190000&compare=1439276400

Sold with Massed Flies Ol' Snaggletooth (30) for Sunbeams Data Mining Light (140):

http://backpack.tf/profiles/76561198090308403?time=1438758000 (August 5th)

http://backpack.tf/profiles/76561198090308403?time=1438844400 (August 6th)

http://backpack.tf/profiles/76561198090308403?time=1438758000&compare=1438844400

140 - 30 = 110 keys

30 for the Snaggle should be close enough. There aren't any good sales to be used. http://backpack.tf/item/259998414

Sold with Sunbeams Your Worst Nightmare (95) + 28.5 keys for Burning Flames Towering Pillar of Hats (!40) + duped It's A Secret To Everybody Pyro's Boron Beanie (57 * .9?) + Sunbeams Cadaver's Cranium (50):

http://backpack.tf/profiles/76561198070053059?time=1440313200 (August 23rd)

http://backpack.tf/profiles/76561198070053059?time=1440572400 (August 26th)

http://backpack.tf/profiles/76561198070053059?time=1440313200&compare=1440572400

(140 + 57 * .9+ 50) * .9 - 95 - 28.5 = 93.67 keys

Rounding down to 90 keys

Duped Secret Boron Beanie has no good sales. Using 57 * .9 as a low estimate. Sale is a bit complicated, but the value here should be around 90-100 keys.

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Some unused older sales:

Sold for Hot Aqua Marine Rocket Launcher (Minimal Wear) (110?):

http://backpack.tf/profiles/76561198169654192?time=1438239600 (July 30th)

http://backpack.tf/profiles/76561198169654192?time=1438326000 (July 31st)

http://backpack.tf/profiles/76561198169654192?time=1438239600&compare=1438326000

Sold for duped Flaming Lantern Backwards Ballcap(~90)? + 2 keys:

http://www.tf2outpost.com/trade/26583042

http://backpack.tf/profiles/76561198069722409?time=1437721200 (July 24th)

http://backpack.tf/profiles/76561198069722409?time=1437807600 (July 25th)

http://backpack.tf/profiles/76561198069722409?time=1437721200&compare=1437807600

Sold for duped Demonflame Fed-Fightin' Fedora + duped Cauldron Bubbles Scotch Bonnet + ~3 keys:

http://www.tf2outpost.com/trade/26510156

http://backpack.tf/profiles/76561198069722409?time=1437116400 (July 17th)

http://backpack.tf/profiles/76561198069722409?time=1437289200 (July 19th)

http://backpack.tf/profiles/76561198069722409?time=1437289200&compare=1437116400

Probably around 90-100 after overpay.

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Sunbeams Your Worst Nightmare:

http://backpack.tf/profiles/76561198067835540?time=1436857200&compare=1436943600