gonna need some 'minis' here. for instance that helmet is out-dated price and clean seller for 33 so that's not gonna work

https://marketplace.tf/items/tf2/30743;5;u133 - $89.99 (51 Keys)

Sold + Spec KS Aussie Sniper + Spec KS Aussie SMG for a Frostbite Noble Nickel Amassment of Hats

https://backpack.tf/profiles/76561198004310955#!/compare/1575676800/1575763200

https://backpack.tf/profiles/76561198325595749#!/compare/1575590400/1575676800

Better for the Nickel

Quicksold for 42 Keys + 1 Key of Items

https://backpack.tf/profiles/76561198325595749#!/compare/1575590400/1575676800

Better for the Hard Counter

https://backpack.tf/profiles/76561198259038650#!/compare/1575331200/1575417600

Wicked Wood Skullbrero (36.5 Keys) + Ghastly Grove Skullbrero (33.5 Keys)

https://backpack.tf/profiles/76561197994697258#!/compare/1575417600/1575504000

36.5 + 33.5 = 70 Keys

The Wicked Wood Skullbrero has these sales:

https://backpack.tf/profiles/76561197994697258#!/compare/1578182400/1578441600 - 40 Keys

https://backpack.tf/profiles/76561198031416862#!/compare/1571961600/1572048000 - Bulk

https://backpack.tf/profiles/76561198141455733#!/compare/1572134400/1572220800 - High

https://backpack.tf/profiles/76561198067946670#!/compare/1572220800/1572393600 - Unpriced Flame Thrower with low sales

https://backpack.tf/profiles/76561198033370726#!/compare/1571702400/1571875200 - 35 Keys

https://backpack.tf/profiles/76561198058287022#!/compare/1571961600/1572048000 - Twisted Radiance Backbreaker's Skullcracker (no other sales)

https://backpack.tf/profiles/76561198058287022#!/compare/1572480000/1572566400 - Blizzardy Ninja (24.5 Keys) + Planets Bolted Birdcage

https://marketplace.tf/items/tf2/31066;5;u126 - $90 (50 Keys) and $59.99 (33 Keys). With the Seller at $66 and these other sales, 50 is also high

Taking 33 - 40 Keys

The Ghastly Grove Skullbrero has these sales:

https://marketplace.tf/items/tf2/31066;5;u127 - $63 (35 Keys), $65 (38 Keys), and $47.22 (29 Keys)

Taking 29 - 38 Keys

https://imgur.com/a/H5dql9p - itrem had a Buy Order at 58 Keys in Sale 1 rather than 52

The histories of the Keys in Sale 4 don't match, so there's no way to be certain that 59 was the sale.

However, with the 21 day seller at 29 (the only sale is yours for ~38, but that's high) on the Football Helmet in Sale 5, that sale will be 53 Keys.

70 can be excluded as high, and you don't need to resuggest over a small difference to 53 - 65.

https://imgur.com/a/zyKy23R - 15 day seller at 70 Keys.