Sold for Circling Heart Napper's Respite (46):

http://www.tf2outpost.com/trade/25758573

http://backpack.tf/profiles/76561198111328771?time=1429599600 (April 21st)

http://backpack.tf/profiles/76561198111328771?time=1429772400 (April 23rd)

46 * .9 = 41.4 keys

Buyout of 40 keys

Sold for Miami Nights Killer's Kabuto (27) (duped):

http://backpack.tf/profiles/76561198063717631?time=1430118000 (April 27th)

http://backpack.tf/profiles/76561198063717631?time=1431068400 (May 8th)

Outlier.

Sold for Strange Specialized Killstreak Australium Sniper Rifle (36) (duped)?

http://www.tf2outpost.com/trade/25675638

Didn't track the Aussie Snipe in histories.

35 keys buyout (duped):

http://www.tf2outpost.com/trade/25563440

http://www.tf2outpost.com/trade/25657856

Couldn't track the sale.

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Circling Heart Napper's Respite:

http://backpack.tf/classifieds/?tradable=1&craftable=1&australium=1&item=Sniper%20Rifle&quality=11&killstreak_tier=2