I knew 15 seemed low.

Just sold it for 20 keys in less than a day.

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Sale 1: 20 keys pure

https://vgy.me/Lc5Qip.png / https://vgy.me/4W0QB1.png

Compare links: https://backpack.tf/profiles/76561198012938128#!/compare/1495584000/1495670400 / https://backpack.tf/profiles/76561198094365132#!/compare/1495497600/1495670400

Looks like the blizz thirst blood was quicksold to a bot: https://backpack.tf/profiles/76561198344491537

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Sale 2: 15

From https://backpack.tf/suggestion/59052350e338776c2008fe06

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Sale 3: $28 on marketplace.tf, May 15th (~12-13 keys) - [ https://marketplace.tf/items/30428;5;u35 / https://backpack.tf/item/5669757011 ]

Low, considering quickbuyers at 13. Also, seller was banned on backpack/outpost.

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No other sales, besides to/from the scrap.tf bot. (Low) - [ https://backpack.tf/item/5669757011 ]