Will this ever have a small range?

Sale 1:

Sold for Cloud 9 Tsarboosh (Suggestion at 13) + ~3 keys in pure/items

No outpost

Seller: https://backpack.tf/profiles/76561198173442901#!/compare/1503273600/1503360000

Buyer: https://backpack.tf/profiles/76561198024332838#!/compare/1503273600/1503360000

X = 16

Sale 2:

Sold for 13 keys + ~1 key in ref

http://www.tf2outpost.com/trade/29277969 - B/O of ~14

Seller: https://backpack.tf/profiles/76561198067699902#!/compare/1500336000/1500595200

Buyer: https://backpack.tf/profiles/76561198152389269#!/compare/1500163200/1500336000

X = 14

Sale 3:

Sold for 12 keys + <0.5 keys in ref

No outpost

Seller: https://backpack.tf/profiles/76561198337734785#!/compare/1497225600/1497312000

Buyer: https://backpack.tf/profiles/76561198135395668#!/compare/1497225600/1497484800

X = 12

Sale 4:

Bulk for Orbiting Fire Slope Scopers + items

Seller: https://backpack.tf/profiles/76561198088901743#!/compare/1501372800/1501545600

Buyer: https://backpack.tf/profiles/76561198173442901#!/compare/1501459200/1501545600

Sale 5:

Sold with 4 keys for Circling Heart Elf Esteem

Seller: https://backpack.tf/profiles/76561198174450971#!/compare/1500336000/1500422400

Buyer: https://backpack.tf/profiles/76561198198332539#!/compare/1500336000/1500422400\

Elf looks overpriced, would be better to update it instead.

Sale 6:

Bulk for Peace Sign Lucky Shot

Seller: https://backpack.tf/profiles/76561198198332539#!/compare/1501027200/1501200000

Buyer: https://backpack.tf/profiles/76561198085347196#!/compare/1501113600/1501200000

Sale 7:

Sold with 2 keys for Blizzardy Storm Samur-Eye

http://www.tf2outpost.com/trade/29300247 - B/O of 14

Seller: https://backpack.tf/profiles/76561198085347196#!/compare/1501200000/1501286400

Buyer: https://backpack.tf/profiles/76561198237456768#!/compare/1501200000/1501286400

Should be used on the Samur-Eye.

Cloud 9 Tsarboosh:

https://backpack.tf/suggestion/599fdf49cf6c75447621502a

Sellers:

~12.9 keys:

http://i.imgur.com/W44wM8v.png

15 keys:

http://i.imgur.com/l0sZvgI.jpg

21 keys:

http://i.imgur.com/3bVCaYy.png - 5 months

Sales at:

12

14

16

Going with 12-16.