There are loads more sales than this...

Sold for circling heart bombing run (will need mini)

http://backpack.tf/profiles/76561198094066374?time=1435561200 (June 29th)

http://backpack.tf/profiles/76561198094066374?time=1436079600 (July 5th)

Sold for electrostatic tyrant's = 33 * 0.9 = 30 keys

http://backpack.tf/profiles/76561197994454891?time=1431759600 (May 16th)

http://backpack.tf/profiles/76561197994454891?time=1432105200 (May 20th)

Sold with stormy bonk boy for sunbeams flipped trilby (need minis)

http://backpack.tf/profiles/76561198088528579?time=1436425200 (July 9th)

http://backpack.tf/profiles/76561198088528579?time=1436511600 (July 10th)

Sold for terror-watt ninja hood (need mini)

http://backpack.tf/profiles/76561198085116555?time=1436252400 (July 7th)

http://backpack.tf/profiles/76561198085116555?time=1436338800 (July 8th)

Sold for specialized aussie scattergun = ~34 keys

http://backpack.tf/profiles/76561198001183422?time=1432969200 (May 30th)

http://backpack.tf/profiles/76561198001183422?time=1433314800 (June 3rd)

Sold for haunted ghosts safe n sound (need mini)

http://backpack.tf/profiles/76561198028900954?time=1434265200 (June 14th)

http://backpack.tf/profiles/76561198028900954?time=1434524400 (June 17th)

Sold for green fetti surgeon's shako (26.5), green fetti hound dog (13) and sweets (~4.5) = (26.5 + 13 + 4.5) * 0.9 = ~40 keys

http://backpack.tf/profiles/76561198157455991?time=1432278000 (May 22nd)

http://backpack.tf/profiles/76561198157455991?time=1432364400 (May 23rd)

Sold for bubling pardner's pompadour and flaming lantern gym rat (need minis)

http://backpack.tf/profiles/76561198045691931?time=1431846000 (May 17th)

http://backpack.tf/profiles/76561198045691931?time=1431932400 (May 18th)