Tonk was a silly goose. It was 62 Keys.

https://backpack.tf/item/7269069933

Sale 1) ?

https://backpack.tf/profiles/76561198418740133#!/compare/1541116800/1541203200

https://backpack.tf/profiles/76561198001812215#!/compare/1541116800/1541203200

https://backpack.tf/item/7323078572

Sale 2) Bulk sale for a Green Energy Villain's Veil

https://backpack.tf/profiles/76561198022071751#!/compare/1541980800/1542153600 - Seller's Backpack

https://backpack.tf/profiles/76561198021272428#!/compare/1542067200/1542153600 - Buyer's Backpack

https://backpack.tf/item/7292728374

Sale 3) Some kind of bulk sale

https://backpack.tf/profiles/76561198140010255#!/compare/1544486400/1544745600

https://backpack.tf/item/7276665385

Sale 4) Sold for a Circling TF Logo Tundra Top + a couple Keys of Items

https://backpack.tf/profiles/76561198089253101#!/compare/1541894400/1541980800 - Seller's Backpack

https://backpack.tf/profiles/76561197971598115#!/compare/1541980800/1542067200 - Buyer's Backpack

Low outlier.

Sale 5) Sold for a Minimal Wear Isotope Festivized Professional Killstreak Backwoods Boomstick Shotgun (90 Keys) + 10 Keys

https://backpack.tf/profiles/76561197971598115#!/compare/1541980800/1542067200 - Seller's Backpack

https://backpack.tf/profiles/76561198055622215#!/compare/1541980800/1542067200 - Buyer's Backpack

The Shotgun was in-date at the time of the sale. This sale is a high outlier nonetheless.

Sale 6) Sold for a Terror-Watt Yellow Belt + Sunbeams Puffy Polar Cap (33 Keys) + Spec KS Aussie Tomislav (~14 Keys) + Holy Grail Banjo + 2 Keys

https://backpack.tf/profiles/76561198055622215#!/compare/1542585600/1542672000

High outlier.

Sale 7) Sold + 10 Keys for a Burning Flames Head Hedge (61 Keys)

https://backpack.tf/profiles/76561198355667850#!/compare/1543622400/1543708800 - Buyer's Backpack

61 - 10 = 51 Keys

Sale 8) Sold for a Kill-a-Watt Patriot Peak (49.5 Keys) + Showstopper Flippin' Awesome (8 Keys) + ~3 Keys of Items + 1 Key

https://backpack.tf/profiles/76561198068301070#!/compare/1543881600/1543968000 - Buyer's Backpack

49.5 + 8 + 3 + 1 = 61.5, which rounds to 62 Keys

https://imgur.com/a/8lO720X - Using this Young Seller at 64 Keys and the 3 Day Seller at 65 Keys to justify 100 being high.

https://backpack.tf/item/7292728374

https://backpack.tf/item/7276665385