Sale #1

http://www.tf2outpost.com/trade/19838512

Bought it with Miami Night Desert Marauder(2.8 * 0.9 = ~2.5 buds)

Backpack of seller

http://backpack.tf/profiles/76561198088459363?time=1400050800 Before

http://backpack.tf/profiles/76561198088459363?time=1400137200 After

Backpack of buyer

http://backpack.tf/profiles/76561198127495579?time=1400050800 Before

http://backpack.tf/profiles/76561198127495579?time=1400173910 After

Total: ~2.5 buds

Sale #2

http://www.tf2outpost.com/trade/19823029

http://www.tf2outpost.com/trade/19870564

Sold it for level 80 Max (3 buds)

Backpack of seller

http://backpack.tf/profiles/76561198127495579?time=1400250937 Before

http://backpack.tf/profiles/76561198127495579?time=1400310000 After

Total: ~3 buds. However, since the seller's b/o is 2 buds. Taking 2 buds as the price.

Invalid sales

Sale #3

http://www.tf2outpost.com/trade/19838937

Can't identify content of sale

Backpack of seller

http://backpack.tf/profiles/76561198083611023?time=1400223600 Before

http://backpack.tf/profiles/76561198083611023?time=1400310000 After

Backpack of buyer

http://backpack.tf/profiles/76561198123366538?time=1400137200 Before

http://backpack.tf/profiles/76561198123366538?time=1400330362 After