I can smell another Mini train coming... just like the Secret Brown Bomber...

http://backpack.tf/item/2055524925

Sale 1) Sold for a SFB BoA (158.5 Keys) + Ooze Pillar (63 Keys) + Stormy Casemaker (42 Keys using the link below) + 2 Keys

http://backpack.tf/profiles/76561198074304069#!/compare/1475366400/1475539200 - Seller's Backpack (the Casemaker was quicksold for 42 Keys)

http://backpack.tf/profiles/76561198049951991#!/compare/1475452800/1475712000 - Buyer's Backpack

158.5 + 63 + 42 + 2 = 265.5, which I'll round to 265 Keys

BoA Mini

http://backpack.tf/suggestion/58673e05c4404568720b1226 - 158.5 Keys

Pillar Mini

Sold for a Green Confetti Brown Bomber (57 Keys) + 6 Keys

http://backpack.tf/profiles/76561198067622687#!/compare/1478649600/1478908800 - Buyer's Backpack

http://backpack.tf/profiles/76561198074304069#!/compare/1478736000/1478822400 - Seller's Backpack

Bomber Micro

http://imgur.com/a/Cs3o8 - Taking 57 Keys since neither of the 60 Key ones have sold in 16 days.

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Sale 2) Sold for a Purple Energy Chill Chullo (210 Keys) + 35 Keys

http://backpack.tf/profiles/76561198203307876#!/compare/1476835200/1476921600

210 + 35 = 245 Keys

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Sale 3) Sold for a Morning Glory Law (319 Keys)

http://backpack.tf/profiles/76561198060828964#!/compare/1477008000/1477094400

http://www.tf2outpost.com/trade/28552614 - Capped by the Buyout of 300 Keys

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Sale 4) Sold for a Haunted Phantasm Party Trick + Haunted Phantasm Jr Das Maddendoktor + Aces High Cloud Crasher

http://backpack.tf/profiles/76561198056753441#!/compare/1477958400/1478044800

Fits in the range.