Resuggesting! Thanks to Blaze for pointing out my mistakes, telling me how to fix them, and giving me info about the sales.

https://marketplace.tf/items/tf2/30316;5;u19

Marketplace.tf Sales

$39.99 / $1.89 = 21.16 keys

Sale #1

Sold for 30 keys pure-

Seller: https://backpack.tf/profiles/76561198157274202#!/compare/1592524800/1592611200

Buyer: https://backpack.tf/profiles/76561198355796365#!/compare/1592524800/1592611200

Sale #2

Sold for a Dead Presidents Peacenik's Ponytail (11.5 keys) + an Aces High Peacenik's Ponytail (10.25 keys) = 12+10= 22 keys-

Seller: https://backpack.tf/profiles/76561197964171516#!/compare/1590278400/1590537600

Buyer: https://backpack.tf/profiles/76561198356061896#!/compare/1589932800/1592611200

Sale #3

Sold for 16 keys-

https://imgur.com/a/v5QE11e

https://bot.tf/stats/item?def=30316&q=5&ef=Circling+Heart&craft=1&aus=0&ks=0

Sales @ 16, 21, 22, 30

Taking 21-22