The Boxcar Children

https://backpack.tf/item/7624782735

Sale 1) Sold for a Green Energy Modest Pile of Hat

https://backpack.tf/profiles/76561198076259234#!/compare/1555718400/1555891200

https://backpack.tf/profiles/76561198140010255#!/compare/1555804800/1555891200

Low outlier.

https://backpack.tf/item/6634081217

Sale 2) ?

https://backpack.tf/profiles/76561198453055175#!/compare/1554422400/1554508800

https://backpack.tf/profiles/76561198203078121#!/compare/1554422400/1554508800

Sale 3) ?

https://backpack.tf/profiles/76561198203078121#!/compare/1554595200/1555113600

https://imgur.com/a/kYSUHfp - Probably sold for the buy order at 98 Keys

Sale 4) Gambled

https://backpack.tf/profiles/76561198089253101#!/compare/1555459200/1555545600

Sale 5) Gambled

https://backpack.tf/profiles/76561198016663834#!/compare/1555459200/1555545600

Sale 6) ?

https://backpack.tf/profiles/76561198156733777#!/compare/1555545600/1555632000

https://backpack.tf/profiles/76561198015534589#!/compare/1555459200/1555545600

https://backpack.tf/item/6010498074

Sale 7) Bulk sale for a Golden Pan

https://backpack.tf/profiles/76561198030383222#!/compare/1557360000/1557446400

Sale 8) Bulk sale for a Bonzo Rotation Sensation

https://backpack.tf/profiles/76561198114402400#!/compare/1559260800/1559347200

https://backpack.tf/item/7611250910

Sale 9) Bulk backpack purchase

https://backpack.tf/profiles/76561198055544256#!/compare/1554508800/1554595200

Sale 10) Sold + Green Confetti Brainiac Hairpiece + Vivid Plasma Janissary Ketche + 5 Keys for a Morning Glory Team Captain (292.5 Keys)

https://backpack.tf/profiles/76561198068732040#!/compare/1556928000/1557014400

https://backpack.tf/profiles/76561198134512931#!/compare/1556928000/1557014400

https://scrap.tf/auctions/VDPZP5

High outlier.

Team Captain Mini

https://backpack.tf/suggestion/5d1cf873d3817257930be0c7 - 292.5 Keys

Sale 11) ?

https://backpack.tf/profiles/76561198134512931#!/compare/1559174400/1559260800

https://backpack.tf/profiles/76561198198896481#!/compare/1559347200/1559433600

https://marketplace.tf/items/tf2/30546;5;u17 - Sold for $270 when Keys were ~$1.77 each and $270 when Keys were ~$1.80 each

https://marketplace.tf/items/tf2/5021;6

270 / 1.77 = 152.5, which I'll round to 155 Keys

270 / 1.80 = 150 Keys