Sale 1:

Sold for 20 keys

Seller: https://backpack.tf/profiles/76561198021055079#!/compare/1551225600/1551312000

https://backpack.tf/item/7430688080

https://i.imgur.com/eREInoW.png

https://i.imgur.com/SACesdU.png

X = 20

Sale 2:

Sold for Miami Nights Grenadier’s Softcap (Suggestion at 19)

Seller: https://backpack.tf/profiles/76561198147671424#!/compare/1550361600/1550448000

Buyer: https://backpack.tf/profiles/76561198078578085#!/compare/1550361600/1550448000

https://backpack.tf/item/7449476307

X = 19

Sale 3:

Sold with 2 keys for Magnetic Hat Protector Phononaut (Suggestion at 20.5)

Seller: https://backpack.tf/profiles/76561198047941585#!/compare/1549756800/1549843200

Buyer: https://backpack.tf/profiles/76561198297911394#!/compare/1549756800/1549843200

https://bot.tf/stats/listings/4WNGOGN4 - B/O of 19

https://backpack.tf/item/7519221827

X = 19

Sale 4:

Sold for Cloud 9 Warhood (Mini at 27 below)

Seller: https://backpack.tf/profiles/76561198198896481#!/compare/1548720000/1548806400

Buyer: https://backpack.tf/profiles/76561198370526525#!/compare/1548720000/1548806400

https://bot.tf/stats/listings/4K672P14 - B/O of 18

X = 18 (Capped by B/O)

Sale 5:

Sold for 15 keys

Seller: https://backpack.tf/profiles/76561198218063977#!/compare/1546646400/1546732800

Buyer: https://backpack.tf/profiles/76561198123224716#!/compare/1546560000/1546732800

https://backpack.tf/item/7427878271

X = 15

Sale 6:

Sold for 15 keys + strange cosmetic

Seller: https://backpack.tf/profiles/76561198015582970#!/compare/1552521600/1552608000

Buyer: https://backpack.tf/profiles/76561198078435541#!/compare/1552348800/1552608000

https://backpack.tf/item/7449476307

X = 15

Sale 7:

Sold for 15 keys

Seller: https://backpack.tf/profiles/76561198157089186#!/compare/1550707200/1550793600

Buyer: https://backpack.tf/profiles/76561198150307915#!/compare/1550620800/1550793600

https://backpack.tf/item/7519221827

X = 15

Sale 8:

Sold to my buy order for 13 keys

Seller: https://backpack.tf/profiles/76561198370526525#!/compare/1548806400/1549411200

Buyer: https://backpack.tf/profiles/76561198021055079#!/compare/1549324800/1549411200

https://backpack.tf/item/7430688080

https://i.imgur.com/3BLSJQB.png

https://i.imgur.com/ylevcmE.png

X = 13

Sale 9:

Sold to my buy order for 12 keys

Seller: https://backpack.tf/profiles/76561198223711348#!/compare/1550534400/1550707200

Buyer: https://backpack.tf/profiles/76561198021055079#!/compare/1550620800/1550707200

https://backpack.tf/item/7559201030

https://i.imgur.com/Pq3FEwg.png

https://i.imgur.com/raSlB3p.png

X = 12

Sale 10:

Sold to a bot for 12 keys

Seller: https://backpack.tf/profiles/76561198005163008#!/compare/1550102400/1550361600

Buyer: https://backpack.tf/profiles/76561198335791307#!/compare/1550275200/1550361600

https://backpack.tf/item/7485820911

https://i.imgur.com/82U6ICO.png - bot.tf confirms

X = 12

Sale 11:

Sold with ~6 keys in items for Killstreak Aus Knife (~17)

Seller: https://backpack.tf/profiles/76561198117991560#!/compare/1551571200/1551657600

Buyer: https://backpack.tf/profiles/76561198190474742#!/compare/1551571200/1551657600

https://backpack.tf/item/7444896127

X = 11

Marketplace Sales:

https://marketplace.tf/items/31025;5;u11

https://manic.tf/keyprice/?at=2019-03-10 - $26 / $1.8 = 14.44 keys

X = 14

Other Sales:

https://backpack.tf/item/7519221827 (#1)

https://backpack.tf/item/7449476307 (#2)

https://backpack.tf/item/7434054799 (#3)

https://backpack.tf/item/7430688080 (#4)

#1

Untraceable

https://backpack.tf/profiles/76561198010517907#!/compare/1549584000/1549670400

https://backpack.tf/profiles/76561198047941585#!/compare/1549497600/1549584000

#2

Sold for Purple Confetti Industrial Festivizer

https://backpack.tf/profiles/76561198078578085#!/compare/1551398400/1552089600

https://backpack.tf/profiles/76561198015582970#!/compare/1552003200/1552089600

No other sales on the Festivizer, using on that instead.

#3

SCM

https://backpack.tf/profiles/76561198011507712#!/compare/1545868800/1546128000

https://backpack.tf/profiles/76561198112281935#!/compare/1545782400/1545868800

#4

Untraceable

https://backpack.tf/profiles/76561198025315150#!/compare/1548547200/1548720000

https://backpack.tf/profiles/76561198198896481#!/compare/1548633600/1548720000

Miami Grenadier’s Softcap:

https://backpack.tf/suggestion/5c8c64ca67807208e244a9ad

Cloud 9 Warhood Mini:

Sold with Strange Pro. KS Your Eternal Reward for Green Energy Otolaryngologist’s Mirror (29.5)

Seller: https://backpack.tf/profiles/76561198873310521#!/compare/1545523200/1545609600

Buyer: https://backpack.tf/profiles/76561198035128943#!/compare/1545523200/1545609600

https://backpack.tf/item/6906808067

X = 27

Magnetic Phononaut:

https://backpack.tf/suggestion/5c8d017bd3817271ab0fa19b

Sellers:

https://i.imgur.com/cIRsm11.png

https://i.imgur.com/CStinDR.png

https://backpack.tf/item/7444896127 - 15 keys

https://backpack.tf/item/7485820911 - 18 keys

https://backpack.tf/item/7559201030 - 18 keys

https://backpack.tf/item/7519221827 - 18 keys

https://backpack.tf/item/7434054799 - ~18.9 keys

https://backpack.tf/item/7427878271 - 23 keys

Sales at:

11

12 (2x)

13

14

15 (3x)

18

19 (2x)

20

11 is too low, excluding 11.

Was originally going to go with 12-20, but that range seems rather wide. Will exclude the sales to buy orders (12-13) and the sales higher than the common selling point, which is currently 18 (5 sellers cheaper than 19+ currently).

Going with 14-18.