Sale:

Seller: https://backpack.tf/profiles/76561198261265788#!/compare/1550534400/1550966400

Buyer: https://backpack.tf/profiles/76561198071230830#!/compare/1550793600/1550880000

Chiroptera Venenata Bone Dome (in-date at 67 keys) + D@D Danger (70 keys) + Spec KS Aussie Rocket Launcher (34 keys) + clean HOUWAR (138 keys)

+ 100 keys = 409, rounding up to 410.

D@D Danger mini:

1.-

Seller: https://backpack.tf/profiles/76561198107249245#!/compare/1547596800/1547683200

Buyer: https://backpack.tf/profiles/76561198079118378#!/compare/1547596800/1547683200

70 keys pure.

2.-

Seller: https://backpack.tf/profiles/76561198143892308#!/compare/1545523200/1545696000

Buyer: https://backpack.tf/profiles/76561198120382814#!/compare/1545523200/1545609600

???

3.-

Seller https://backpack.tf/profiles/76561198119130644#!/compare/1548892800/1548979200

Buyer https://backpack.tf/profiles/76561198119009060#!/compare/1548806400/1548979200

Bulky

4.-

Buyer: https://backpack.tf/profiles/76561198167149339#!/compare/1550016000/1550707200

Seller: https://backpack.tf/profiles/76561198129552058#!/compare/1550361600/1550448000

Sold with 273 keys for a Demonflame Tough Stuff Muffs. Could be used to update the price of the Tough Stuff Muffs instead.

Sale 1 of the Danger is the only valid one i was able to find, so i am going with 70 keys.

Last suggestion still in date: https://backpack.tf/suggestion/5c1f1824cf6c7506930e1f19