Sale 1:

Sold for Killstreak Australium Stickybomb Launcher (16) + Australium Grenade Launcher (17)

http://www.tf2outpost.com/trade/28375021 - B/O of 32

Seller: http://backpack.tf/profiles/76561198021055079#!/compare/1469664000/1469750400

Buyer: http://backpack.tf/profiles/76561198122377854#!/compare/1469750400/1469836800

http://puu.sh/qks78/ce89c04ee6.png

http://puu.sh/qks6J/caa522296e.jpg

X = 32 (Capped by B/O)

Sale 2:

Sold for 28 keys + #68 Aviator Assassin (~1?)

http://www.tf2outpost.com/trade/28257005 - No B/O, Buyer offers here

Seller: http://backpack.tf/profiles/76561198071238509#!/compare/1466294400/1466380800

Buyer: http://backpack.tf/profiles/76561198129596771#!/compare/1466294400/1466380800

http://www.tf2outpost.com/trade/28271498 - Seller originally tried to sell his low-craft for 2 keys, then lowered to 1 key. Therefore, valuing the Aviator Assassin at 1 key

X = 29

No current sellers

Sales at 29 and 32

Going with 29-32