Bot.tf sales: https://cdn.discordapp.com/attachments/716014614298755085/742681029915050034/pan_proof.PNG

Sales:

1 @ 20 keys

Past 30 days

1 @ 18 keys, 48.77 ref, 18.87 keys, ~18.9 keys

1 @ 18 keys, 40.00 ref, 18.71 keys, ~18.7 keys

1 @ 20 keys

Buys:

Past 7 days

1 @ 19 keys, 1.44 ref, 19.03 keys, ~19 keys

Past 30 days

1 @ 17 keys, 41.33 ref, 17.74 keys, ~17.7 keys

1 @ 19 keys, 17.33 ref, 19.31 keys, ~19.3 keys

1 @ 19 keys, 1.44 ref, 1.03 keys, ~19 keys

Marketplace.tf sales: https://marketplace.tf/items/tf2/264;11

Taking past week:

August 7 2020: 1 @ $38.59 (median key price: $1.85, 38.59/1.85=20.86 keys) ~20.9 keys

August 8 2020: 1 @ $40.10 (median key price: $1.87, 40.10/1.87=21.44 keys) ~21.4 keys

1 @ $40.99 (40.99/1.87=21.92 keys)

August 9 2020: 1 @ $38.98 (median key price: $1.87, 38.98/1.87=20.84 keys= ~20.8 keys

August 11 2020: 2 @ $38.98 (median key price: $1.85, 38.98/1.85=21.07 keys) ~21.1 keys

Buyers are at 18.05-18.06 keys, sellers are at 19.86-19.87 keys; 20.8 keys and above is too high, 17.7 keys is too low

Taking 18.7-19.3 keys as the value for my suggestion