More sales:

Sold for a Searing Plasma Birdcage(16 Keys) and ~2 Keys in Sweets(18 Keys total)

http://backpack.tf/profiles/76561198255781235#!/compare/1486252800/1486339200

Sold for a Circling Peace Sign Noble Amassment of Hats(23.5 Keys, round to 24)

http://backpack.tf/profiles/76561198241558190#!/compare/1487289600/1487376000

Sold for a Disco Beat Down Outdoorsman(~21 Keys, Outdated). ~5 Keys in Sweets and a Pro KS Wrench Skin

http://backpack.tf/profiles/76561198139690875#!/compare/1485907200/1485993600

The value on the Skin is uncertain, so I wouldn't use this sale. This supports the noble sale though.

18-24 should be fine for this, resuggest at that.