Sale 1:

Sold for a Kill-a-Watt Galvanized Gibus, a Duped Dp steel Shako, 12 keys of sweets and 10 keys

(60 + 18 + 12)*0.9 + 10 = 91 keys

http://www.tf2outpost.com/trade/25660681

http://imgur.com/f5MDPcG

Sale 2:

Sold for a Duped Burning Spartan

(85*0.9) = 76.5 rounding to 77 keys

http://www.tf2outpost.com/trade/26120515

http://backpack.tf/profiles/76561198092306318?time=1433401200 (June 4th)

http://backpack.tf/profiles/76561198092306318?time=1433487600 (June 5th)

Mini for the Duped Burning Spartan:

Sold for an Australium RL and a Stormy Rack

(46*0.9) + 49 = 90.4 capping at 85 keys

http://backpack.tf/profiles/76561198092306318?time=1433574000 (June 6th)

http://backpack.tf/profiles/76561198092306318?time=1433746800 (June 8th)

Mini for the Duped DP Metal Shako

Sold with 1 key for a DP Infernal Impaler

(21*0.9) - 1 = 17.9 rounding to 18 keys

http://backpack.tf/profiles/76561198047208911?time=1433142000 (June 1st)

http://backpack.tf/profiles/76561198047208911?time=1433314800 (June 3rd)

Mini Mini for the Stormy Rack: ~46

http://backpack.tf/vote/id/5567d7e0ba8d88cb4b8b458b

Conclusion:

Sales at 91 and 77, taking the final range at 77 to 91 keys.