Sale 1:

Sold for 18 keys

http://www.tf2outpost.com/trade/28176602 - B/O of 18

Seller: http://backpack.tf/profiles/76561198056598316#!/compare/1465516800/1465603200

Buyer: http://backpack.tf/profiles/76561198046665338#!/compare/1465516800/1465603200

X = 18

Sale 2:

Sold for Peace Sign Hotrod (16.5)

Seller: http://backpack.tf/profiles/76561198107039369#!/compare/1463443200/1463529600

Buyer: http://backpack.tf/profiles/76561198152667546#!/compare/1463356800/1463616000

X = 17 (Rounded from 16.5)

Sale 3:

Quicksold for 14 keys

http://www.tf2outpost.com/trade/28115758 - B/O of 17

Seller: http://backpack.tf/profiles/76561198142349119#!/compare/1461542400/1461715200

Buyer: http://backpack.tf/profiles/76561197988155310#!/compare/1461715200/1461801600

X = 14

Sale 4:

Sold for Overclocked Plug-in Prospector

http://www.tf2outpost.com/trade/28136241 - Deleted B/O

Seller: http://backpack.tf/profiles/76561197988155310#!/compare/1462233600/1462320000

Buyer: http://backpack.tf/profiles/76561198152647646#!/compare/1462320000/1462492800

Would prefer to update the Prospector with this sale

No current sellers

Sales at:

14

17

18

14 is low

Going with 17-18