Fast. 400 on the dash.

https://backpack.tf/item/2715247152

Sale 1) ?

https://backpack.tf/profiles/76561198023034908#!/compare/1556496000/1556582400

Sale 2) Bulk sale for a Secret TC

https://backpack.tf/profiles/76561198062075870#!/compare/1557964800/1558224000

https://backpack.tf/item/1554113336

Sale 3) Sold + 3 Keys for a Smoking White Russian

https://backpack.tf/profiles/76561198152746870#!/compare/1556236800/1557014400

https://backpack.tf/profiles/76561197994697258#!/compare/1556841600/1556928000

This should be used to update the Russian.

https://backpack.tf/item/537753458

Sale 4) Sold for 15 Keys

https://backpack.tf/profiles/76561198029813157#!/compare/1557187200/1557273600

Sale 5) Sold + ~3 Keys of Items for a Duped Stormy Storm Dragonborn Helm

https://backpack.tf/profiles/76561198063537837#!/compare/1557014400/1557273600

https://backpack.tf/profiles/76561198313362742#!/compare/1557187200/1557273600

Using this for the Stormy Dragonborn.

https://marketplace.tf/items/tf2/517;5;u18 - Sold for $30 when Keys were ~$1.82 each and $29 when Keys were ~$1.81 each

https://marketplace.tf/items/tf2/5021;6

30 / 1.82 = 16.48, which rounds to 16 Keys

29 / 1.81 = 16.02, which rounds to 16 Keys