Sale 1:

backpack after: http://backpack.tf/profiles/76561198079799505?time=1421568000

backpack before: http://backpack.tf/profiles/76561198079799505?time=1421395200

Sold for a disco beat down L'homme burglarre (4.3)

4.3 x0.9 =

3.87 rounded up to

3.9 buds

Sale 2:

backpack after: http://backpack.tf/profiles/76561198121012571?time=1421222400

backpack before: http://backpack.tf/profiles/76561198121012571?time=1421136000

sold for a professional killstreak australium sniper rifle

4 x0.9 =

3.6 buds

mini on sniper:

http://backpack.tf/classifieds/?item=Sniper%20Rifle&quality=11&tradable=1&craftable=1&australium=1

starting from 62 keys

http://www.tf2outpost.com/trade/24739411 b.o of 65 keys

http://www.tf2outpost.com/trade/24688584 b.o fo 60 keys

http://www.tf2outpost.com/trade/24695676 b.o of 62 keys

http://www.tf2outpost.com/trade/24671516 sold for 57 keys

http://www.tf2outpost.com/trade/24747601 offer of 4 buds (60 keys)

Taking as 60 keys i.e 4 buds

Sale 3:

backpack before: http://backpack.tf/profiles/76561198017605637?time=1421222400

backpack after: http://backpack.tf/profiles/76561198017605637?time=1421308800

DBD Surgeon's stahlhelm 4.75

4.75 x0.9 = 4.275 rounded up to

4.3

Additional proof:

http://www.tf2outpost.com/trade/24148622 b.o of 4 buds 1 month old

http://www.tf2outpost.com/trade/24693030 b.o of 4 buds (actually a month old as he had another trade selling it for 4 buds: http://www.tf2outpost.com/trade/23992470)

http://www.tf2outpost.com/trade/23724134 b.o of 4.5 buds 2 months old

http://www.tf2outpost.com/trade/24661535 b.o of 4 buds 'quicksell'

Taking high end at 4 buds considering there are 3 with that b.o