Sale 1:

Sold for 12 keys

http://www.tf2outpost.com/trade/28610867 - B/O of 13, re-listed here: http://www.tf2outpost.com/trade/28622805 - B/O lowered to 12

Seller: http://backpack.tf/profiles/76561198163204583#!/compare/1479859200/1480032000

Buyer: http://backpack.tf/profiles/76561198219288407#!/compare/1479859200/1479945600

X = 12

Sale 2:

Quicksold for 12 keys

No outpost

Seller: http://backpack.tf/profiles/76561198112612121#!/compare/1483833600/1483920000

Buyer: http://backpack.tf/profiles/76561198131268766#!/compare/1483833600/1483920000

X = 12

Sale 3:

Sold for 8 keys + Victory Lap (3.7 at the time)

http://www.tf2outpost.com/trade/28596594 - B/O of 15

Seller: http://backpack.tf/profiles/76561198057777568#!/compare/1479081600/1480291200

Buyer: http://backpack.tf/profiles/76561198193904281#!/compare/1480291200/1480377600

X = 12

Sale 4:

Sold for 11 keys + Sharp Dresser

http://www.tf2outpost.com/trade/28594115 - B/O of 13

Seller: http://backpack.tf/profiles/76561198006851608#!/compare/1479168000/1479513600

Buyer: http://backpack.tf/profiles/76561198163204583#!/compare/1478304000/1479254400

X = 11

Sale 5:

Sold for 8 keys + ~1.5 keys in metal/items

Seller: http://backpack.tf/profiles/76561198258136701#!/compare/1484265600/1484352000

Buyer: http://backpack.tf/profiles/76561198164622774#!/compare/1484265600/1484352000

X = 10

Sale 6:

Sold with ~5 keys in items for Insomnia Carcharodon

Seller: http://backpack.tf/profiles/76561198219288407#!/compare/1479945600/1480032000

Buyer: http://backpack.tf/profiles/76561198035897364#!/compare/1479859200/1479945600

Not using, due to instability of the Carcharodon’s price.

Sale 7:

Sold for Power Surge Bombing Run

Seller: http://backpack.tf/profiles/76561198064510665#!/compare/1484438400/1484611200

Buyer: http://backpack.tf/profiles/76561198120405526#!/compare/1484524800/1484611200

Should be used to Price the Bombing Run

Sale 8:

Sold for Blizzardy Storm Madame Dixie

Seller: http://backpack.tf/profiles/76561198120405526#!/compare/1484611200/1484697600

Buyer: http://backpack.tf/profiles/76561198243334908#!/compare/1484524800/1484611200

Might be better to update the Dixie with this sale. Dixie has sellers for much less than its price at the moment.

Sale 9:

Bulk for DBD Killer’s Kabuto

Seller: http://backpack.tf/profiles/76561198038445175#!/compare/1483747200/1483833600

Buyer: http://backpack.tf/profiles/76561198112612121#!/compare/1483747200/1483833600

Sellers:

13 keys:

http://i.imgur.com/N8W9WMi.png - 1 month

http://backpack.tf/u/76561198076020691

http://www.tf2outpost.com/trade/28693869

14 keys:

http://i.imgur.com/J7tHr7U.png - listed for 15 here

http://backpack.tf/u/76561198088745138

http://www.tf2outpost.com/trade/28726621

16 keys:

http://i.imgur.com/MrlbpXG.png - 1 month

http://backpack.tf/u/76561198115767778

http://www.tf2outpost.com/trade/28688539

http://backpack.tf/u/76561198017901187

Offers:

http://www.tf2outpost.com/trade/28351498 – 6 months

http://backpack.tf/u/76561198027246196

Sales at:

10

11

12 (3x)

Buyer at 11. Excluding 11 and lower. Edit: Buyer removed their buy order immediately after making the suggestion. However, 12 still seems to be the most common trading point, and I doubt 11 should be included.

Only one of the three sales at 12 quicksold. Given that there are no sales for higher, and the seller at 13 is a month old now, it would probably be reasonable to not exclude 12.

Going with 12 flat.