I have a dream that one day the every traders will love those darn 3rd effect.

Sale 1

http://www.tf2outpost.com/trade/21385925 - Sold for Strange Professional Killstreak Australium Black Box (56$ on SCM, after 15% tax = 48$ = 19 keys) (Outlier)

Sale 2

http://www.tf2outpost.com/trade/21213353 - Sold for Massed Flies Milkman (1.9*0.9 = 1.7 buds)

Sale 3

http://www.tf2outpost.com/trade/21059918 - http://imgur.com/zRNwUrV (The seller is so nice!) - Sold for Kill-a-Watt Safe'n'Sound (1.7 buds) + 17.22-ref sweet (2.4 keys = 0.1 buds) + 2 keys (0.1 buds) = (1.8*0.9 + 0.1 = 1.7 buds)

Sale 4

http://www.tf2outpost.com/trade/20807538 - Sold for a Stormy Storm Reggaelator (1.6*0.9 = 1.4 buds)

Sellers

http://www.tf2outpost.com/trade/22082292 - 1.5 buds

http://www.tf2outpost.com/trade/22183957 - 1.5 buds

http://www.tf2outpost.com/trade/21899599 - 1.6 buds

http://www.tf2outpost.com/trade/22096236 - 2 buds

Unused sales

http://www.tf2outpost.com/trade/21065339 - Unconfirmed.

http://www.tf2outpost.com/trade/21431077 - Unconfirmed.

http://www.tf2outpost.com/trade/20421630 - Sold to a quickbuyer ( http://www.tf2outpost.com/trade/21426241 ) for an unknown amount of pure.

Feel free to counter / support my proofs.