"El Jefe" is a Spanish term meaning the boss.

Alright.

Sale 1

http://www.tf2outpost.com/trade/21919901 - Sold for a '72 Taunt: Buy A Life (2.3 buds). No overpay. (Outlier)

Sale 2

http://www.tf2outpost.com/trade/21479391 - Sold for a Max Head, he added 2 keys (3.3 - 0.1 = 3.2 buds)

Sale 3

http://www.tf2outpost.com/trade/21470929 - Sold for a Steaming Modest Pile of Hat, he added 4 keys (2.3 - 0.2 = 2.1 buds). No overpay. (Outlier)

Sale 4

http://www.tf2outpost.com/trade/22613180 - Sold for a Cloud 9 Runner's Warm-Up (4*0.9 = 3.6 buds)

Sale 5

http://www.tf2outpost.com/trade/22046903 - Sold for a Burning Flames Bombing Run (3.3 buds). No overpay.

Feel free to counter / support my proofs.