Sale 1:

Sold for 17 keys + Uncraftable Flip Flops (2)

My B/O was probably 20. I didn’t list it on outpost.

Seller: http://backpack.tf/profiles/76561198021055079#!/compare/1491696000/1491782400

Buyer: http://backpack.tf/profiles/76561198078999364#!/compare/1491696000/1491782400

http://imgur.com/a/2UGQV

X = 19

Sale 2:

Sold for 18 keys

http://www.tf2outpost.com/trade/29181796 - B/O of 20

Seller: http://backpack.tf/profiles/76561198150783829#!/compare/1494720000/1494806400

Buyer: http://backpack.tf/profiles/76561198051446000#!/compare/1494806400/1494979200

X = 18

Sale 3:

Sold for 17 keys

If I remember correctly, the seller was selling for 20 when I had it.

Seller: http://backpack.tf/profiles/76561198011321852#!/compare/1494201600/1494288000

Buyer: http://backpack.tf/profiles/76561198061846341#!/compare/1494115200/1494288000

X = 17

Sale 4:

Sold for Searing Plasma Toy Tailor + ~2 keys in taunts

http://www.tf2outpost.com/trade/28351503 - B/O of 26

Seller: http://backpack.tf/profiles/76561198040330756#!/compare/1494892800/1495152000

Buyer: http://backpack.tf/profiles/76561198332421893#!/compare/1495065600/1495324800

Most sales on the Toy Tailor were bulk, and this would appear to be a possible outlier anyways. Should be alright to exclude this when there are 3 pure sales here.

Sale 5:

Bulk for Frostbite Titanium Tyrolean

Seller: http://backpack.tf/profiles/76561198132206374#!/compare/1490140800/1490227200

Buyer: http://backpack.tf/profiles/76561198021055079#!/compare/1490140800/1490227200

Sale 6:

Bulk for Logo Wraith and strange degreaser

Seller: http://backpack.tf/profiles/76561198078999364#!/compare/1494460800/1494547200

Buyer: http://backpack.tf/profiles/76561198150783829#!/compare/1494460800/1494547200

Sellers:

24 keys:

http://i.imgur.com/yVDAizs.png - 12 days

http://backpack.tf/u/76561198074924284

Offers:

http://www.tf2outpost.com/trade/29209126 – 6 days

http://backpack.tf/u/76561198050849650

Sales at:

17

18

19

Going with 17-19.