Updating

Item 1: https://backpack.tf/item/9250216930 Gambling History, Ignoring

Item 2: https://backpack.tf/item/2820499826 Bought on Ctrade.tf for 15~ keys

Item 3: https://backpack.tf/item/13471996363 Bought off Marketplace.tf for ~14 Keys

Marketplace.tf Sales:

https://marketplace.tf/items/tf2/615;5;u15

$24.99/1.74=~14 Keys (Jul 28th)

Median Price of Keys that day was $1.74

Ctrade.tf Sales:

https://ctrade.tf/item/Searing%20Plasma%20Birdcage

$27.49/1.80=~15 Keys (Aug 29th)

Median Price of Keys for that day was $1.80

Key Prices: https://ctrade.tf/item/Mann%20Co.%20Supply%20Crate%20Key

Proof: Screenshot

Total Sales:

14, 15

Taking 15 Flat, as Buyers are @15.1 Keys