Return to those low-tier hats.

Sale 1

http://www.tf2outpost.com/trade/21780030 - BO of 1 bud (1 bud = 20 keys)

Sale 2

http://www.tf2outpost.com/trade/22412189 - Sold for a '72 Taunt: Buy A Life (2.3 buds) but had BO of 1.6 buds.

Sale 3

http://www.tf2outpost.com/trade/21954438 - Sold for a Vivid Plasma Gentleman's Gatsby (2.1 buds). He added Rancho (1 key) + 10 ref (1.2 keys) + Team Spirit Gen. Wilson Weave (0.5 keys) (2.1 - 0.2 = 1.9 buds)

Sale 4

http://www.tf2outpost.com/trade/22157347 - Sold for a Orbiting Fire Fruit Shoot (1.2*0.9 = 1.1 buds)

Sellers

http://www.tf2outpost.com/trade/22529865 - 1.3 buds

http://www.tf2outpost.com/trade/22466035 - 1.7 buds

http://www.tf2outpost.com/trade/22406096 - 2.2 buds

Feel free to counter / support my proofs.