Sale 1)

sold for non gifted/duped lvl 89 max

http://backpack.tf/profiles/76561198009758113?time=1427612400 (March 29th)

http://backpack.tf/profiles/76561198009758113?time=1427698800 (March 30th)

http://www.tf2outpost.com/trade/25466766

~28 keys

Sale 2)

Sold for 23 keys pure (quick sale?)

http://backpack.tf/profiles/76561198086369219?time=1427871600 (April 1st)

http://backpack.tf/profiles/76561198086369219?time=1428044400 (April 3rd)

Note:

http://backpack.tf/profiles/76561198043810142?time=1427871600 (April 1st)

http://backpack.tf/profiles/76561198043810142?time=1427958000 (April 2nd)

Keys came from horace sale

Sale 3)

Sold for scorching snaggle

http://www.tf2outpost.com/trade/25786680

http://backpack.tf/profiles/76561198080223036?time=1430550000 (May 2nd)

http://backpack.tf/profiles/76561198080223036?time=1430722800 (May 4th)

49.5*.9= ~45 keys

45 keys

http://www.tf2outpost.com/trade/25793529 unsold 58 keys for a month

Taking 45, given how quickly the 23s seem to have gone and the march sales are much older.