Peace Treety.

https://backpack.tf/item/280833838

Sale 1) Sold for a Professional Killstreak Australium Wrench (~24 Keys)

https://backpack.tf/profiles/76561198179707937#!/compare/1506643200/1506729600

Sale 2) Quicksold for 17 Keys

https://backpack.tf/profiles/76561198197261851#!/compare/1506816000/1506902400

Sale 3) Sold for 18 Keys + 18 Refined

https://backpack.tf/profiles/76561197963500354#!/compare/1507334400/1507420800

Low Outlier.

Sale 4) Sold for a Circling TF Logo Hot Dogger

https://backpack.tf/profiles/76561198010328802#!/compare/1512172800/1512518400 - Seller's Backpack

https://backpack.tf/profiles/76561198036695121#!/compare/1512432000/1513382400 - Buyer's Backpack

The Buyer bought the Hot Dogger for 25 Keys, so I'll count that as the Mini.

The only other sales on it that I could find are 19 Keys + 11 Refined, and a Searing Waxy Wayfinder (which is 2 years Outdated and should be updated with this).

https://backpack.tf/item/5075039792

Sale 5) Sold for 25 Keys

https://backpack.tf/profiles/76561198053700606#!/compare/1510617600/1510704000

Sale 6) Bulk sale for a Scorching Flames Base Metal Billycock

https://backpack.tf/profiles/76561198223779024#!/compare/1511308800/1511395200

Sale 7) Sold for 25 Keys

https://backpack.tf/profiles/76561197996095002#!/compare/1512000000/1512086400

https://backpack.tf/item/1694856492

Sale 8) Sold for a Starstorm Insomnia Towering Titanium Pillar of Hats (25 Keys) + 2 Keys

https://backpack.tf/profiles/76561198213189552#!/compare/1508457600/1509580800

25 + 2 = 27 Keys

Titanium Mini

https://backpack.tf/suggestion/5a355f3dcf6c7544980a2f1b - 25 Keys