Resuggesting with a Buyout Cap as pointed out by Mindacos

Battlefield One

http://backpack.tf/item/4519060119

Sale 1) Sold for a Specialized Killstreak Australium Grenade Launcher (~16 Keys)

http://backpack.tf/profiles/76561198026077467#!/compare/1477440000/1477526400

Sale 2) Sold for an Orbiting Planets Dr's Dapper Topper (21.5 Keys)

http://backpack.tf/profiles/76561198016070169#!/compare/1476748800/1476921600

http://www.tf2outpost.com/trade/28530333 - Capped by the Buyout of 20 Keys

Sale 3) Sold for a Duped Searing Plasma Tippler's Tricorne + Strange Villain's Veil

http://backpack.tf/profiles/76561198028640255#!/compare/1475798400/1475884800

Fits in the range.

Sale 4) Sold for a Duped Haunted Ghosts Pugilist's Protector

http://backpack.tf/profiles/76561198160629681#!/compare/1474502400/1475884800

Fits in the range.

Sale 5) Sold for a Bubbling Thirst Blood + 1 Key

http://backpack.tf/profiles/76561198204034064#!/compare/1477440000/1477526400

Fits in the range.

http://backpack.tf/item/3330464955

Sale 6) Sold for 16 Keys

http://backpack.tf/profiles/76561198069493147#!/compare/1473811200/1473897600

Credits to Blaze