Eh.

Sold with 4 keys for a Steaming Honcho's Headgear (15.5 keys)

http://backpack.tf/profiles/76561198056651449?time=1423468800 (February 9th)

http://backpack.tf/profiles/76561198056651449?time=1423555200 (February 10th)

(15.5 * 0.9) - 4 = 10 keys

———

Sold for BMOC (6 keys) + Strange Reserve Shooter w/ Airborne Kills (~1 key) + Parted KS Sniper Rifle + RL w/ Airborne Kills (~3 keys together) + ~0.6 keys in other items

http://backpack.tf/profiles/76561198098395949?time=1423036800 (February 4th)

http://backpack.tf/profiles/76561198098395949?time=1423123200 (February 5th)

(6 + 1 + 3 + 0.6) * 0.9 = 9.54 keys

———

http://www.tf2outpost.com/trade/25680371

Sold for 1 bud (~5.5 keys)

http://backpack.tf/profiles/76561198049591910?time=1428822000 (April 12th)

http://backpack.tf/profiles/76561198049591910?time=1428908400 (April 13th)

Bud: http://backpack.tf/item/95508969

Slouch: http://backpack.tf/item/3626801033

———

Parted Sniper Rifle + RL w/ Airborne Kills:

Sold for Robots Destroyed Strange Part ~3 keys

http://backpack.tf/profiles/76561198097305698?time=1422777600 (February 1st)

http://backpack.tf/profiles/76561198097305698?time=1423468800 (February 9th)