Moo... Just a mini for another suggestion.

Sale #1: (Keys were 10.33-10.44) ~12 keys (Buds were 15.5 keys during the time of sale.) ~0.8 buds

http://www.tf2outpost.com/trade/23680628

Sold for 120 refined metal

Backpack before: http://backpack.tf/profiles/76561198080748189?time=1415779200

Backpack after: http://backpack.tf/profiles/76561198080748189?time=1415865600

Sale #2: 10 * 0.9 = 9 keys (outlier)

[No outpost link]

Sold for a KaW Gridiron Guardian

Guardian: http://backpack.tf/item/2587071777

Big Country: http://backpack.tf/item/828632755

Sale #3: 12 * 0.9 = 11 keys

http://www.tf2outpost.com/trade/24767433

Sold for a Nut's and Bolt's Connoisseur's Cap

Backpack before: http://backpack.tf/profiles/76561198057502522?time=1421913600

Backpack after: http://backpack.tf/profiles/76561198057502522?time=1422000000

Con. Cap: http://backpack.tf/item/1787051962

Big Country: http://backpack.tf/item/601181243

Mini for Guardian:

http://backpack.tf/vote/id/54c308bbb98d88f5648b5072

Mini for the Con. Cap:

http://www.tf2outpost.com/trade/24577260 - 12 key B/O

Thank you, have a nice day!