Sale #1:

http://www.tf2outpost.com/trade/25573900

Sold for a Blizz Voodoo Juju (outdated)

http://backpack.tf/profiles/76561198083722720?time=1427698800 (March 30th)

http://backpack.tf/profiles/76561198083722720?time=1428044400 (April 3rd)

Sale #2:

http://www.tf2outpost.com/trade/25736081

Quick-sold for 22 keys

http://backpack.tf/profiles/76561198065593039?time=1428130800 (April 4th)

http://backpack.tf/profiles/76561198065593039?time=1429426800 (April 19th)

Current seller had higher offers: http://www.tf2outpost.com/trade/25891999

Sale #3:

http://www.tf2outpost.com/trade/25847493

Sold for a Planets Hairpiece (29)

http://backpack.tf/profiles/76561198070023244?time=1430636400 (May 3rd)

http://backpack.tf/profiles/76561198070023244?time=1430895600 (May 6th)

29 * 0.9 = 26 keys

Sale #4:

http://www.tf2outpost.com/trade/24970606

Sold for a Pro KS Australium Flame Thrower (26.7)

http://backpack.tf/profiles/76561198035785804?time=1427785200 (March 31st)

http://backpack.tf/profiles/76561198035785804?time=1428130800 (April 4th)

Australium Flame Thrower: http://www.tf2outpost.com/trade/25587085

26.7 * 0.9 = 24 keys

Sale #5:

http://www.tf2outpost.com/trade/26019891

Sold with a White Bill's (2.5) for a KaW Jefe (32)

http://backpack.tf/profiles/76561198044034474?time=1432882800 (May 29th)

http://backpack.tf/profiles/76561198044034474?time=1432974566 (May 30th)

(32 * 0.9) - 2.5 = 26 keys, B/O was 25 keys

Strange Professional Killstreak Australium Flame Thrower:

http://steamcommunity.com/market/listings/440/Strange%20Professional%20Killstreak%20Australium%20Flame%20Thrower

Around $60.86 (seller), $70 (buyer) $65.43 (median) during the time of sale. ~26.7 keys @ $2.45 per key

Sellers:

http://www.tf2outpost.com/trade/25891999 Only current seller, asking 25 keys