Turns out I actually missed a few sales.

Sale 1:

Sold for Planets KE + Mallard Panama = ~81 keys with overpay

http://backpack.tf/profiles/76561198102607360?time=1426489200 (March 16th)

http://backpack.tf/profiles/76561198102607360?time=1426662000 (March 18th)

Sale 2:

Sold for a Lantern Glengarry + 12 keys = ~37 keys with overpay

http://backpack.tf/profiles/76561198046267597?time=1428822000 (April 12th)

http://backpack.tf/profiles/76561198046267597?time=1429167600 (April 16th)

Sale 3: (Duped)

Sold for 30 keys + Stormy Cold Killer = 59 keys with overpay

http://backpack.tf/profiles/76561198054382165?time=1430550000 (May 2nd)

http://backpack.tf/profiles/76561198054382165?time=1430636400 (May 3rd)

Sale 4:

Offered (and sold) with a Stormy 13th Beak + 50 keys for a Scorching Rack = 74 keys

http://backpack.tf/profiles/76561198048956541?time=1429858800 (April 24th)

http://backpack.tf/profiles/76561198048956541?time=1430031600 (April 26th)

Sale 5:

Sold for a GE Rifleman = 72 keys with overpay

http://backpack.tf/profiles/76561197989107593?time=1424592000 (February 22nd)

http://backpack.tf/profiles/76561197989107593?time=1424764800 (February 24th)

Sale 6:

Sold for 4 buds + Pro KS SF Huntsman = ~42 keys

http://backpack.tf/profiles/76561198024878433?time=1427612400 (March 29th)

http://backpack.tf/profiles/76561198024878433?time=1427698800 (March 30th)

Sale 7:

Sold for 45 keys (Credit to MegaGenta)

http://www.tf2outpost.com/trade/25841117

Sale 8:

Sold for 36 keys + '72 I See You = ~53 keys with overpay

http://backpack.tf/profiles/76561197990172296?time=1427526000 (March 28th)

http://backpack.tf/profiles/76561197990172296?time=1427612400 (March 29th)

Sellers

http://www.tf2outpost.com/trade/25821233 - 2 weeks at 60 keys

http://www.tf2outpost.com/trade/25934523 - Young at 55 keys

http://www.tf2outpost.com/trade/25427793 - 1 month at 80 keys

B/O of 55 has been raised to 60.