Thought i'd update this.

Sold for 20 Keys

http://backpack.tf/profiles/76561198121326368?time=1427241163 -> http://backpack.tf/profiles/76561198121326368?time=1427266800

http://www.tf2outpost.com/trade/25422737

Sold with ~2 Keys in Sweets for an Australium Medi Gun(25 Keys, Offered)(23 Keys total)

http://backpack.tf/profiles/76561198079290590?time=1428562800 -> http://backpack.tf/profiles/76561198079290590?time=1428649200

http://www.tf2outpost.com/trade/25590709

Sold for a Disco Beat Down Brain Bucket(18 Keys with Overpay) and a Bubbling Lucky Shot(12 Keys with Overpay)(30 Keys total)

http://backpack.tf/profiles/76561198004427058?time=1429426800 -> http://backpack.tf/profiles/76561198004427058?time=1429772400

20-30 Keys should be fine.

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