Sale 1

https://backpack.tf/profiles/76561198122724739#!/compare/1495411200/1495497600

Bulk

Sale 2

https://backpack.tf/profiles/76561198122724739#!/compare/1494288000/1495152000

https://backpack.tf/profiles/76561198312583107#!/compare/1495065600/1495152000

DBD Buckaroos (https://backpack.tf/suggestion/595eac20cf6c7531a01675b3) = 17 keys

http://www.tf2outpost.com/trade/28903949 - b/o of 18

Sale 3

https://backpack.tf/profiles/76561198109838613#!/compare/1499126400/1499299200

Smoking Air Dog (16 keys - http://screenshot.sh/odT8WGNrcrskT) + 1 key = 17

Sale 4

https://backpack.tf/profiles/76561198173442901#!/compare/1499212800/1499299200

C9 Outta' + taunts = capped @ b/o of 21: http://www.tf2outpost.com/trade/29259442

Sale 5

https://backpack.tf/profiles/76561198173442901#!/compare/1498435200/1498521600

Bulk

Sale 6

https://backpack.tf/profiles/76561198087172601#!/compare/1497312000/1497398400

Strange N&B Private Eye - http://screenshot.sh/m7thKxWwOgBNR = 14 keys

Sale 7

https://backpack.tf/profiles/76561198125791160#!/compare/1497225600/1497312000

Electrostatic Coupe D'isaster (14)

Sale 8

https://backpack.tf/profiles/76561198125791160#!/compare/1496448000/1496534400

With 5 keys for Duped PE Mongolian = Low

Sale 9

https://backpack.tf/profiles/76561198219902779#!/compare/1499040000/1499212800

Horace + P.fetti Fro (15) = 18

http://www.tf2outpost.com/trade/29259951 - b/o = 19.5

Sale 10

https://backpack.tf/profiles/76561198134520748#!/compare/1499126400/1499212800

Will use on Headsplitter

Summary:

Sales @ 14, 14, 17, 17, 18, 21

Seller on classies for 18 days @20

http://screenshot.sh/n9it9Z5kvk80r

21 high then

Buyer @13:

http://screenshot.sh/mK9AMiMRW8RzF

I'd call 14 low

17-18 range