Sale 1:

Sold for Killstreak Aussie Scattergun (23) + 3 EOTL keys (2)

No outpost

Seller: https://backpack.tf/profiles/76561198093438754#!/compare/1510444800/1510531200

Buyer: https://backpack.tf/profiles/76561198135541601#!/compare/1510012800/1510531200

X = 25

Sale 2:

Sold for Orbiting Fire Data Mining Light (24)

No outpost

Seller: https://backpack.tf/profiles/76561198203201612#!/compare/1511568000/1511654400

Buyer: https://backpack.tf/profiles/76561198219980724#!/compare/1511481600/1511654400

X = 24

Sale 3:

Sold for another Orbiting Fire Data Mining Light (24)

No outpost

Seller: https://backpack.tf/profiles/76561198098410618#!/compare/1508371200/1508630400

Buyer: https://backpack.tf/profiles/76561198249466880#!/compare/1508457600/1509235200

X = 24

Sale 4:

Sold for 10 keys + ~14 keys in items

No outpost

Seller: https://backpack.tf/profiles/76561198305676157#!/compare/1505260800/1505347200

Buyer: https://backpack.tf/profiles/76561198130396428#!/compare/1504915200/1505347200

http://steamcommunity.com/market/listings/440/Collector%27s%20Specialized%20Killstreak%20Crusader%27s%20Crossbow – Crossbow sale at ~10 keys, valuing that at 10, and the other items at 4.

X = 24

Sale 5:

Sold for Smoking Cowl (Suggestion at 13.5) + ~11 keys in pure/items

http://www.tf2outpost.com/trade/29421526 - B/O of 24

Seller: https://backpack.tf/profiles/76561198134266699#!/compare/1510358400/1510444800

Buyer: https://backpack.tf/profiles/76561198093438754#!/compare/1510358400/1510444800

X = 24 (Capped by B/O)

Sale 6:

Sold for Orbiting Fire Jumper’s Jeepcap (Suggestion at 13.5) + 7 keys

No outpost

Seller: https://backpack.tf/profiles/76561198303059077#!/compare/1508112000/1508198400

Buyer: https://backpack.tf/profiles/76561198102442712#!/compare/1508112000/1508198400

X = 21

Sale 7:

Sold for Green Confetti Hard Counter + Dead Presidents Furious Fukaamigasa (No recent sales, using the seller) + 2 keys

No outpost

Seller: https://backpack.tf/profiles/76561198135541601#!/compare/1510531200/1510617600

Buyer: https://backpack.tf/profiles/76561198203201612#!/compare/1510531200/1510617600

http://www.tf2outpost.com/trade/29449353 - seller at 11 on the Fukaa, taking 11.

Even if the Hard Counter were to be 8 flat, this would still fall into the range.

Sale 8:

Sold with ~2 keys in items for Power Surge Outdoorsman

Seller: https://backpack.tf/profiles/76561198130396428#!/compare/1505952000/1506556800

Buyer: https://backpack.tf/profiles/76561198098410618#!/compare/1506297600/1506556800

Should be used on the Outdoorsman.

Sale 9:

Sold with cheap items for DBD Herald’s Helm

Seller: https://backpack.tf/profiles/76561197996095002#!/compare/1511654400/1511740800

Buyer: https://backpack.tf/profiles/76561198275222296#!/compare/1511740800/1511827200

Can be used on the Herald’s Helm.

Orbiting Fire Jumper’s Jeepcap:

https://backpack.tf/suggestion/5a25252844325a3c2a800310

Smoking Cowl:

https://backpack.tf/suggestion/5a253699cf6c7559581dab2b

Sellers:

23 keys:

https://i.imgur.com/yuOj953.png - 6 days

24 keys:

https://i.imgur.com/B2LMBBD.png - young

Sales at:

21

24 (4x)

25

Going with 21-25.