Sale 1: (credits to Jordan for the proof of sale)

Sold for 2 buds + 30 keys (30/15) = 2 + 2 = 4

http://www.tf2outpost.com/trade/23708208

http://i.imgur.com/PBrNwc8.png?1

Sale 2: (credits to Jordan for the proof of sale)

Sold for 3 buds + Australium Wrench (1.55*0.9) + Bill's Hat ([4/14]*0.9) + ~1 keys in sweets ([1/14]*0.9) = 3 + 1.395 + 0.26 + 0.06 = 4.715 (rounding to 4.7)

http://www.tf2outpost.com/trade/23971029

http://i.imgur.com/yLvuD49.png?1

Sale 3: (credits to Jordan for the proof of sale)

Sold for 3 buds + 13 keys = 3 + 1 = 4

http://www.tf2outpost.com/trade/24087199

http://i.imgur.com/u6erAkX.png?1

Sale 4: (credits to Jordan for the proof of sale)

Sold for Smoking Pyromancer's Mask* (3.6*0.9) + Australium Knife (1.4*0.9) + ~7 keys in sweets ([7/13]*0.9) = 3.24 + 1.26 + 0.48 = 4.96 (rounding to 5)

http://www.tf2outpost.com/trade/24101769

http://i.imgur.com/4PJsZDE.png?1

Sale 5:

Sold for 66 keys (66/16) = 4.125 (rounding to 4.1)

http://www.tf2outpost.com/trade/23675317

http://backpack.tf/profiles/76561198057065810?time=1415865600

Sale 6: (invalid sale)

Unable to identify sale

http://www.tf2outpost.com/trade/23783895

http://backpack.tf/profiles/76561197982358877?time=1416384000 → http://backpack.tf/profiles/76561197982358877?time=1416470400

Sale 7:

Sold for 70 keys (70/14) = 5

http://www.tf2outpost.com/trade/23880108

Sale 8: (invalid sale)

Unable to identify sale

http://www.tf2outpost.com/trade/23323110

http://backpack.tf/profiles/76561198053582296?time=1414134000 → http://backpack.tf/profiles/76561198053582296?time=1414220400

Mini for the Smoking Pyromancer's Mask:

http://www.tf2outpost.com/trade/23925978 - Sold for Max's Head + 4 keys = 3.7

http://www.tf2outpost.com/trade/24152701 - B/O of 3.5 buds

~Valuing at 3.6 buds

Notes:

For valuing the buds and bills, I'm using the price at the time of sale.

HUGE CREDITS TO JORDAN FOR PROOF OF 4 SALES! :)