Sale 1:

Sold for $46.99 on Marketplace.tf

https://marketplace.tf/items/152;5;u35

Unable to identify item history.

46.99/2.03 = ~23.1

X = 23

Sale 2:

Sold for Planets Hat With No Name (19.5)

No outpost

Seller: https://backpack.tf/profiles/76561198014811898#!/compare/1491696000/1493251200

Buyer: https://backpack.tf/profiles/76561198060730470#!/compare/1493164800/1493510400

X = 20

Sale 3:

Sold with cheap cosmetic for Infernal Flames Box Trot (40)

http://webcache.googleusercontent.com/search?q=cache:orb0uq-O7IcJ:www.tf2outpost.com/trade/29177047+&cd=1&hl=en&ct=clnk&gl=au – B/O of 20

Seller: https://backpack.tf/profiles/76561198054945991#!/compare/1495756800/1495843200

Buyer: https://backpack.tf/profiles/76561198093179917#!/compare/1495843200/1495929600

X = 20 (Capped by B/O)

Sale 4:

Sold for 18 keys + ~2 keys in taunts/metal

Seller: https://backpack.tf/profiles/76561198023542389#!/compare/1499990400/1500076800

Buyer: https://backpack.tf/profiles/76561198183241050#!/compare/1499990400/1500076800

X = 20

Sale 5:

Sold for Aussie Wrench (~18) + 2 keys

No outpost

Seller: https://backpack.tf/profiles/76561198171061573#!/compare/1497830400/1497916800

Buyer: https://backpack.tf/profiles/76561198195483499#!/compare/1497830400/1497916800

X = 20

Sale 6:

Sold with Pro. KS Righteous Bison (1) for Green Confetti Noble (20)

http://www.tf2outpost.com/trade/29272038 - B/O of 19

Seller: https://backpack.tf/profiles/76561198258128870#!/compare/1499644800/1499817600

Buyer: https://backpack.tf/profiles/76561198070880686#!/compare/1499731200/1499817600

X = 19

Sale 7:

Sold for $39.99 on Marketplace.tf

https://marketplace.tf/items/152;5;u35

https://backpack.tf/item/1673928957

39.99/2.07 = ~19.3

X = 19

Sale 8:

Sold for 18 keys (Buyer’s compare link)

Seller: https://backpack.tf/profiles/76561198344933095#!/compare/1498435200/1498521600

Buyer: https://backpack.tf/profiles/76561198169028500#!/compare/1498435200/1498521600

X = 18

Sale 9:

Sold for Cloud 9 Scotsman’s Stove Pipe (In-date at 18, sellers at 15, going with 16.5)

No outpost

Seller: https://backpack.tf/profiles/76561198098880809#!/compare/1494892800/1495584000

Buyer: https://backpack.tf/profiles/76561198054004552#!/compare/1495411200/1495584000

Scotsman: http://i.imgur.com/bkPkb14.png

X = 17

Sale 10:

Sold with 1 key for Stormy Storm Batter’s Helm (18)

http://www.tf2outpost.com/trade/29261943 - B/O of 20

Seller: https://backpack.tf/profiles/76561198035757271#!/compare/1499644800/1499731200

Buyer: https://backpack.tf/profiles/76561198023542389#!/compare/1499644800/1499731200

X = 17

Sale 11:

Sold for Spec. KS Aussie Minigun (17)

http://www.tf2outpost.com/trade/29213092 - B/O of 20

Seller: https://backpack.tf/profiles/76561198074764837#!/compare/1496620800/1496793600

Buyer: https://backpack.tf/profiles/76561198072550739#!/compare/1496620800/1496707200

X = 17

Sale 12:

Sold with keys for Tesla Coil Nasty Norsemann

Seller: https://backpack.tf/profiles/76561198072550739#!/compare/1496966400/1497052800

Buyer: https://backpack.tf/profiles/76561198171061573#!/compare/1496966400/1497139200

Should be used on the norsemann.

Sale 13:

Sold for Purple Confetti Voodoo JuJu

Seller: https://backpack.tf/profiles/76561198195483499#!/compare/1497916800/1498003200

Buyer: https://backpack.tf/profiles/76561198068127299#!/compare/1497916800/1498003200

Should definitely be used on the JuJu.

Sale 14:

Sold for Smoking Swagman’s + ~4 keys in items

http://www.tf2outpost.com/trade/29175590 - B/O of 18

Seller: https://backpack.tf/profiles/76561198121021107#!/compare/1494633600/1494720000

Buyer: https://backpack.tf/profiles/76561198098880809#!/compare/1494115200/1494720000

This’ll either lie in the range, or be countered by the buyer:

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

Don’t worry, I’ll get around to the swagman soon ;)

Sellers:

16.8 keys:

http://i.imgur.com/mfXRqOE.png - 4 days

17 keys:

http://i.imgur.com/qJTuy3A.png - 5 days

Sales at:

17 (3x)

18

19 (2x)

20 (5x)

23

23 is an outlier. Excluding 23.

Going with 17-20.