Gee, Wiz. You practically did all the work.

And yes, this is a joke.

http://backpack.tf/item/2380094367

Sale 1) Sold + Team Spirit Bill's (~3) for a Midnight Whirlwind Deep Fried Desire (19)

http://backpack.tf/profiles/76561198118261743/#!/compare/1453017600/1455782400

Bills: http://www.tf2outpost.com/item/440,4582759142,126,6

Deep Fried: http://www.tf2outpost.com/item/440,4579706928,1119,5

19 - 3 = 16 Keys

Deep Fried Desire Mini

http://backpack.tf/vote/id/56d12057ba8d886109f418f1 - 19 Keys

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Sale 2) Sold + ~6.5 Keys of Items for an Abduction Universal Translator (21)

http://backpack.tf/profiles/76561198077179618/#!/compare/1455609600/1455868800

Translator: http://www.tf2outpost.com/item/440,4605138092,30658,5

https://gyazo.com/1687217ba2869a0b1b98d11b153cfc55 - Credits to TheWiz

21 - 6.5 = 14.5 Keys, which rounds to 15 Keys

Translator Mini

http://backpack.tf/vote/id/56d129c7dea9e9b4421e00ee - 21 Keys