Reflection

https://backpack.tf/item/3690764099

Sale 1) Sold for 17 Keys

https://backpack.tf/profiles/76561198080179568#!/compare/1541894400/1541980800

IDs match.

Sale 2) Sold for 15 Keys + 20 Refined

https://backpack.tf/profiles/76561198337734785#!/compare/1545523200/1545609600

Rounds to 16 Keys

https://backpack.tf/item/2225001041

Sale 3) ?

https://backpack.tf/profiles/76561198018528305#!/compare/1545436800/1545523200

https://backpack.tf/item/2216543174

Sale 4) Sold for a Circling Peace Sign Samur-Eye

https://backpack.tf/profiles/76561198118054397#!/compare/1540512000/1540684800

High outlier.

Samur-Eye Mini

https://marketplace.tf/items/359;5;u18 - Sold for $35 when Keys were ~$1.81 each

https://marketplace.tf/items/5021;6/Mann%20Co.%20Supply%20Crate%20Key

35 / 1.81 = 19.34, which rounds to 19 Keys

https://backpack.tf/item/1803563723

Sale 5) Sold for a Smoking Modest Metal Pile of Scrap (18 Keys)

https://backpack.tf/profiles/76561198313538268#!/compare/1539648000/1539734400

Scrap Mini

https://backpack.tf/suggestion/5c287a90cf6c75678534a8f3 - 18 Keys

https://imgur.com/a/LpXtGuw - 15 Day Seller at 17 Keys. 2 Month Seller at 18 Keys.

https://backpack.tf/item/2216543174

https://backpack.tf/item/1803563723

Calling 18 and 19 high.