Credit to Teeny for the sales here.

http://backpack.tf/profiles/76561198009272632#!/compare/1469577600/1469664000

Could only find 10 keys when sorting by time.

10 keys.

http://backpack.tf/profiles/76561198128028307#!/compare/1468713600/1468886400

Sold with ~1.5 keys sweets for kill-a-watt sultan's ceremonial(~12)

~11 keys.

http://backpack.tf/profiles/76561198061018294#!/compare/1468195200/1468281600

Smoknig Tam

~10 keys.

http://backpack.tf/profiles/76561198272086521#!/compare/1470268800/1470355200

Sold for orbiting planets glengarry bonnet + spec ks kit(~1)

~10 keys

http://backpack.tf/profiles/76561198309505973#!/compare/1470009600/1470096000

Bulk quicksale?

http://backpack.tf/profiles/76561198133211830#!/compare/1469145600/1469318400

Sold with 9 keys in items for a S. Gibus

~8 keys. Outlier

http://backpack.tf/profiles/76561198139160957#!/compare/1467849600/1467936000

Sold for strange spec ks festive huntsman(~10), strange anger(~1.5) and bills(~2)

~14 keys.

http://backpack.tf/profiles/76561198083539773#!/compare/1466380800/1466467200

10 keys.

http://backpack.tf/profiles/76561198255610390#!/compare/1465689600/1465862400

Gfetti Dread knot

~14 keys?

http://backpack.tf/profiles/76561198070151102#!/compare/1465257600/1465430400

NnB Beanie

~13 keys?

http://backpack.tf/profiles/76561198121293215#!/compare/1466553600/1466640000

11 keys.

http://backpack.tf/profiles/76561198093111250#!/compare/1470182400/1470441600

12 keys. Credit to Probably Pie for this sale.

Beanie mini ~13 keys?

http://backpack.tf/profiles/76561198200083143#!/compare/1466121600/1470700800

Smoking Merryweather ~13 keys outdated, quickbuyers at 10, probably still at ~13 keys but seems a little high for the beanie.

Gfetti Dread mini ~14?

http://backpack.tf/profiles/76561198255610390#!/compare/1468627200/1468713600

Sold with a key for a Pfetti Birdcage(~15). Seems high, current price of 12 probably more accurate.

Sultan mini ~12 keys

http://backpack.tf/profiles/76561198150435517#!/compare/1468800000/1468886400

Sold with ~4 keys in items for an aussie ambassador(~16)

~12 keys

Genngarry mini ~11

Sellers at ~11

http://imgur.com/yVhVFsT

Seller at 11 for 5 days for the Gym Rat

http://www.tf2outpost.com/trade/28389913

Plenty of sales at 10-11, given a couple higher sales I think its fair to keep the 12 pure sale in. Minis on the Beanie and Dread are iffy at best, very few sales, they should probably be more around 12.