I guess I'll do this since nobody else resuggested. I also found a third sale which is on par to what was mentioned in the last suggestion from polar!

Fun fact:

There is really 2 of these in existence, backpack just don't know!

http://www.tf2outpost.com/item/440,3450788186,30093,5

http://www.tf2outpost.com/item/440,1985968546,30093,5

Sale #1: 10 + 9 + ~2 = 21 buds

http://www.tf2outpost.com/trade/24093650

Sold for a Cloudy Moon Marauder + A Duped Secret to Everybody Drill hat + 21 keys

Backpack before: http://backpack.tf/profiles/76561198025208249?time=1421568000

Backpack after: http://backpack.tf/profiles/76561198025208249?time=1421654400

Sale #2: 20 * 0.9 = 18 buds

http://www.tf2outpost.com/trade/24869368

Sold for a Duped Scorching Kabuto

Backpack before: http://backpack.tf/profiles/76561198109369803?time=1422777600

Backpack after: http://backpack.tf/profiles/76561198109369803?time=1422864000

Sale #3: 23 * 0.9 = 20.7 rounding up to 21 buds

http://www.tf2outpost.com/trade/24746673

Sold for a Anti Freeze Tough Stuff Muffs

Backpack before: http://backpack.tf/profiles/76561198071508711?time=1422000000

Backpack after: http://backpack.tf/profiles/76561198071508711?time=1422518400

Outpost histories, since backpack's don't match up.

Muffs: http://www.tf2outpost.com/item/440,3482507376,984,5

Hive Minder: http://www.tf2outpost.com/item/440,3450788186,30093,5

Mini for Drill: ~9 pure

http://backpack.tf/vote/id/54cb4ed1b98d88d4728b47c2

http://gyazo.com/4d8be83ddeeba81a878a473f17daa18a

Mini for Duped Kabuto: 20 buds

http://www.tf2outpost.com/trade/24925975

Sold for a Scorching Anger

Backpack before: http://backpack.tf/profiles/76561198109369803?time=1422864000

Backpack after: http://backpack.tf/profiles/76561198109369803?time=1423036800