Mini..

Sales

Sale 1: Untrace

https://backpack.tf/profiles/76561198083746573#!/compare/1593475200/1593907200

https://backpack.tf/profiles/76561198318713129#!/compare/1589673600/1599264000

Sale 2: Sold for 27 keys

https://backpack.tf/profiles/76561198298394035#!/compare/1597449600/1597536000

https://backpack.tf/profiles/76561198130058321#!/compare/1596844800/1597536000

Sale 3: Sold with Orbiting Fire YWN for Scorching Flames Airdog

https://backpack.tf/profiles/76561198181204070#!/compare/1597276800/1597363200

https://backpack.tf/profiles/76561198298394035#!/compare/1596931200/1597363200

Better used for the Airdog.

Sale 4: Untrace

https://backpack.tf/profiles/76561198070705963#!/compare/1596153600/1596326400

https://backpack.tf/profiles/76561198181204070#!/compare/1573516800/1597276800

Sale 5: Untrace

https://backpack.tf/profiles/76561198267189538#!/compare/1598486400/1598659200

https://backpack.tf/profiles/76561198047498094#!/compare/1567123200/1599091200

Probably marketplace below.

Sale 6: Untrace

https://backpack.tf/profiles/76561198022385992#!/compare/1598572800/1598832000

https://backpack.tf/profiles/76561198267189538#!/compare/1598486400/1598572800

Sale 7: Bulk

https://backpack.tf/profiles/76561198349348738#!/compare/1598140800/1600387200

https://backpack.tf/profiles/76561198146265553#!/compare/1599782400/1599868800

Sale 8: Sold for 23 keys

https://backpack.tf/profiles/76561198438525576#!/compare/1596153600/1596240000

https://backpack.tf/profiles/76561198349348738#!/compare/1596153600/1596240000

Sale 9: Sold for 22 keys

https://backpack.tf/profiles/76561199001137951#!/compare/1595721600/1596326400

https://backpack.tf/profiles/76561198438525576#!/compare/1594857600/1596153600

Sale 10: 0.44 refined was traced

https://backpack.tf/profiles/76561198088730620#!/compare/1593993600/1597190400

https://backpack.tf/profiles/76561199001137951#!/compare/1594512000/1595289600

Sale 11: Sold for 26 keys

https://backpack.tf/profiles/76561198137909800#!/compare/1593043200/1593129600

https://backpack.tf/profiles/76561198088730620#!/compare/1593043200/1593129600

Sale 12: Bulk/Untrace

https://backpack.tf/profiles/76561199039080265#!/compare/1599264000/1599523200

https://backpack.tf/profiles/76561198244962432#!/compare/1599436800/1599523200

Sale 13: Traced about 12 keys~ of items

https://backpack.tf/profiles/76561198868969121#!/compare/1598918400/1599004800

https://backpack.tf/profiles/76561199039080265#!/compare/1598832000/1598918400

Sale 14: Sold for Miami Nights Globetrotter

https://backpack.tf/profiles/76561198868969121#!/compare/1598659200/1598832000

https://backpack.tf/profiles/76561198259283110#!/compare/1598832000/1598918400

Better used there, less sales available.

Sale 15: Traced 4 keys?

https://backpack.tf/profiles/76561198322957656#!/compare/1598745600/1598832000

https://backpack.tf/profiles/76561198259283110#!/compare/1598745600/1598832000

Sale 16: Sold with Orbiting Fire Human Cannonball for Circling Heart Medic's Mountain Cap

https://backpack.tf/profiles/76561198062579834#!/compare/1598745600/1598832000

https://backpack.tf/profiles/76561198322957656#!/compare/1598745600/1598832000

Better used there.

Sale 17: Untrace

https://backpack.tf/profiles/76561198189440837#!/compare/1597276800/1598659200

https://backpack.tf/profiles/76561198062579834#!/compare/1573689600/1598659200

Sale 18: Sold for 25 keys

https://backpack.tf/profiles/76561198341171690#!/compare/1595289600/1595462400

https://backpack.tf/profiles/76561198189440837#!/compare/1594684800/1596585600

https://bot.tf/stats/item?def=31042&q=5&ef=Green%20Energy&craft=1&aus=0&ks=0&source=browser_script

https://gyazo.com/bae4e8d3e750034a1c31476d4a890659

Sale 19: Sold for 18 keys~

https://backpack.tf/profiles/76561198087761315#!/compare/1593475200/1593561600

https://backpack.tf/profiles/76561198341171690#!/compare/1593388800/1593475200

https://bot.tf/stats/item?def=31042&q=5&ef=Green%20Energy&craft=1&aus=0&ks=0&source=browser_script

https://gyazo.com/bae4e8d3e750034a1c31476d4a890659

Other exchanges, such as tradebacks, stn, mptf

https://backpack.tf/item/7981745404

https://backpack.tf/item/7957424223

Marketplace

https://marketplace.tf/items/tf2/31042;5;u9

June

$59.99 on June 28 (59.99/2.05 = 29~)

https://manic.tf/keyprice/?at=2020-06-28

59.99 on June 29 (59.99/2.01 = 30~)

https://manic.tf/keyprice/?at=2020-06-29

July

$57 on July 28 (57/1.92 = 30~)

https://manic.tf/keyprice/?at=2020-07-28

https://backpack.tf/item/8750475692

August

$30 on August 1 (30/1.91 = 16~)

https://manic.tf/keyprice/?at=2020-08-01

44.44 on August 2 (44.44/1.9 = 23~)

https://manic.tf/keyprice/?at=2020-08-02

https://backpack.tf/item/8750475692

41.99 on August 28 (41.99/1.85 = 23~)

https://manic.tf/keyprice/?at=2020-08-28

https://backpack.tf/item/7981745404

Classifieds

https://gyazo.com/4932b2b435eb3bf14ef8fe4318fb8be0

Summary

Sales at 18, 22, 23, 25, 26, and 27.

Marketplace sales at 16, 23, 23, 29, 30, and 30.

Conclusion

Excluding 16, 18, and 22 due to buyers up to 22.

29 and 30 seem a bit higher, being marketplace sales as well. Going to exclude them here, seems fair as I am excluding 3 sales at lower as well.

Going with 23-27 here.