Mini.

Sale 1: https://backpack.tf/profiles/76561198411680954#!/compare/1572393600/1577318400

https://backpack.tf/profiles/76561198151150175#!/compare/1576108800/1577318400

Something.

Sale 2: https://backpack.tf/profiles/76561198151150175#!/compare/1579564800/1580428800

https://backpack.tf/profiles/76561198324700619#!/compare/1580342400/1580428800

Sold for a Strange Killstreak Australium Knife (~18: https://bot.tf/stats/listings/4EE10D5E )

Sale 3: https://backpack.tf/profiles/76561198324700619#!/compare/1580428800/1580515200

https://backpack.tf/profiles/76561198401453066#!/compare/1580515200/1580601600

Sold for a Max's Severed Head (19 keys) + ~5.5 in adds, high.

https://bot.tf/stats/listings/MLR513Z5

https://bot.tf/stats/listings/4OV8DXLW

https://bot.tf/stats/listings/YDL69RKX

https://bot.tf/stats/listings/MLR58XP8

https://bot.tf/stats/listings/YDL67POV

Sale 4: https://backpack.tf/profiles/76561198401453066#!/compare/1580515200/1580601600

https://backpack.tf/profiles/76561198311437371#!/compare/1580428800/1580601600

Big bulk.

Sale 5: https://backpack.tf/profiles/76561198311437371#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198093114319#!/compare/1581811200/1581897600

Sold with Brain-Warming for rifle? High

Sale 6: https://backpack.tf/profiles/76561198093114319#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198796395930#!/compare/1581811200/1581897600

Sold with the Hot Dog + Brain-Warming + RL for something

Sale 7: https://backpack.tf/profiles/76561198796395930#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198113084770#!/compare/1581724800/1581897600

12 pure + ref

Sale 8: https://backpack.tf/profiles/76561198113084770#!/compare/1581897600/1581984000

https://backpack.tf/profiles/76561198136810646#!/compare/1581638400/1581984000

?

Sale 9: https://backpack.tf/profiles/76561198136810646#!/compare/1581984000/1582070400

https://backpack.tf/profiles/76561198807602991#!/compare/1581897600/1581984000

?

Sale 10: https://backpack.tf/profiles/76561198807602991#!/compare/1581984000/1582243200

https://backpack.tf/profiles/76561198855892118#!/compare/1581897600/1581984000

Sold for a Dead Presidents Bolted Bicorne (~8 keys) + a Midnight Whirlwind Taunt: Runner's Rhythm (4 keys) + a ~key in adds.

8 + 4 + 1 = 13

Mini for the Bolted: https://backpack.tf/suggestion/5e5aefd57bcdb86d225b8b94

Mini for the taunt: https://backpack.tf/suggestion/5e5afb2c0412a506a6403bee

Sale 11: https://backpack.tf/profiles/76561198855892118#!/compare/1582156800/1582243200

https://backpack.tf/profiles/76561198101498111#!/compare/1581984000/1582243200

?

Sale 12: https://backpack.tf/profiles/76561198337734785#!/compare/1575936000/1576022400

https://backpack.tf/profiles/76561198133973878#!/compare/1575936000/1576022400

?

Sale 13: https://backpack.tf/profiles/76561198133973878#!/compare/1576972800/1577232000

https://backpack.tf/profiles/76561198009721889#!/compare/1577059200/1577232000

Sold for a Searing Plasma Bottle Cap (15 keys) + 2 keys.

15 + 2 = 17

Sale 14: https://backpack.tf/profiles/76561198009721889#!/compare/1577750400/1577923200

https://backpack.tf/profiles/76561198063872254#!/compare/1577750400/1577923200

Use there.

Sale 15: https://backpack.tf/profiles/76561198063872254#!/compare/1577923200/1578009600

https://backpack.tf/profiles/76561198116182688#!/compare/1577923200/1578009600

Sold with ~2 keys in adds for a Circling Peace Sign Towering Pillar of Hats (17 keys)

17 - 2 = 15

Sale 16: https://backpack.tf/profiles/76561198116182688#!/compare/1578182400/1578441600

https://backpack.tf/profiles/76561198337734785#!/compare/1578355200/1578441600

?

Sale 17: https://backpack.tf/profiles/76561198337734785#!/compare/1579046400/1579132800

https://backpack.tf/profiles/76561198018509795#!/compare/1579046400/1579132800

?

Sale 18: https://marketplace.tf/items/tf2/108;5;u16 - 29.99/1.78 = ~17

Sales: 18, 24.5, 12, 13, 17, 15 and 17. Classies: https://i.imgur.com/vob9viV.png. 15-18.