My time to shine!

Mini.

Sale 1: https://backpack.tf/profiles/76561198049378596#!/compare/1546300800/1546387200 - 51 pure, qs.

Sale 2: https://backpack.tf/profiles/76561198119634686#!/compare/1541808000/1541894400

https://backpack.tf/profiles/76561198156358496#!/compare/1541808000/1541894400

50 pure, qs.

Sale 3: https://backpack.tf/profiles/76561198004322657#!/compare/1542499200/1542585600

https://backpack.tf/profiles/76561198119634686#!/compare/1542499200/1542585600

55 pure.

Sale 4: https://backpack.tf/profiles/76561198004322657#!/compare/1543276800/1543363200

Sold with a Haunted Ghosts Shooter's Sola Topi (16 keys) for a Starstorm Insomnia Hong Kong Cone (80 keys)

80 - 16 = 64

Mini for the Sola: https://marketplace.tf/items/158;5;u8 - 27.96/1.72 = ~16, classies: https://i.imgur.com/B7wtsVg.png

Sale 5: https://backpack.tf/profiles/76561198066161207#!/compare/1544140800/1544227200

https://backpack.tf/profiles/76561198080179568#!/compare/1544140800/1544227200

?

Additional by Foam:

I would give this the 50-55 range. Unsold for 51 (and formerly 52) for at least half a month now (this is 2 weeks ago: https://imgur.com/a/dypqB40 ; courtesy of blaze)

Sales: 55 and 64. Classies: https://i.imgur.com/f091z67.png. Excluding 64 entirely seems like the best option here. 50-55.