Taking all Indate Sales

Marketplace.tf

https://marketplace.tf/items/tf2/30494;13;strange

$50.12/1.99=~25 Keys (Jun 8th)

Median Price of Keys that day were 1.99

SCM Sales:

https://steamcommunity.com/market/listings/440/Strange%20Haunted%20Head%20Hunter

https://steamcommunity.com/market/pricehistory/?appid=440&market_hash_name=Strange%20Haunted%20Head%20Hunter

$60.91/2.32=~26 Keys (May 13th)

$68.68/2.30=~30 Keys (May 20th)

$67.92/2.31=~29 Keys (May 30th)

$68.60/2.31=~30 Keys (Jun 2nd)

$52.87/2.33=~23 Keys (Jun 7th)

$68.83/2.32=~30 Keys (Jun 11th)

$68.48/2.24=~31 Keys (Jul 15th)

Total Sales:

23, 25, 26, 29, 30, 30, 30, 31

Excluding the Sale @23 since Current Buyers match/exceed that sale and no sale at that price has happened in over a month.