So many pure sales.

Sold for 4 Buds

http://backpack.tf/profiles/76561198064785839?time=1420422228 -> http://backpack.tf/profiles/76561198064785839?time=1420444800

http://www.tf2outpost.com/trade/24383420

Sold for 39 Keys(Buds = 11.25k)(3.5)

http://backpack.tf/profiles/76561198035078069?time=1419148800 -> http://backpack.tf/profiles/76561198035078069?time=1419321600

http://www.tf2outpost.com/trade/24189108

Sold for a Level 1 Max's Head(3) and 1 Key(3.1 Total)

http://backpack.tf/profiles/76561198053554728?time=1423382400 -> http://backpack.tf/profiles/76561198053554728?time=1423641600

http://www.tf2outpost.com/trade/24994425

Sold for 40 Keys(Although he claimed 4 Buds? I'll just use this as supportive)

http://backpack.tf/profiles/76561197969667344?time=1419544084 -> http://backpack.tf/profiles/76561197969667344?time=1420012800

http://www.tf2outpost.com/trade/241643247

Sold for 1 Bud and 30 Keys(Buds = 14k)(3.1)

http://backpack.tf/profiles/76561198080250669?time=1417075200 -> http://backpack.tf/profiles/76561198080250669?time=1417161600

Sold for 4 Buds

http://backpack.tf/profiles/76561198017531527?time=1420733231 -> http://backpack.tf/profiles/76561198017531527?time=1422345600

http://www.tf2outpost.com/trade/247995801

Both 3.1 and 4 seem to sell commonly, so 3.1-4 should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.