Widening the range.

Sold for 28 Keys

http://www.tf2outpost.com/trade/27790244

Sold for a Duped Nuts & Bolts Crone's Dome(29 Keys) and 6 Keys(35 Keys total)

http://backpack.tf/profiles/76561198074924284/#!/compare/1454140800/1454227200

Duped Nuts & Bolts Crone's Dome mini suggestion

Sold for an Orbiting Planets Head Warmer(12 Keys)* and ~16 Keys in Sweets(at the time)(28 Keys total)

http://backpack.tf/profiles/76561198161032643/#!/compare/1453017600/1454054400

*No possible mini, using current price.

Sold for a Green Black Hole Helmet Without A Home(30 Keys)

http://backpack.tf/profiles/76561198132080681/#!/compare/1454140800/1454227200

Using 28-30.

Two sales, 28-35 Keys should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.