I like Bubbles

Pop!

Sellers: - https://gyazo.com/099cf12a9d75a0593e56f76b52fbb4f1

https://backpack.tf/item/7323217612 - 2 months @ 9 keys

https://backpack.tf/item/2941927459 - 7 days @ 9 keys

Sale 1)

https://backpack.tf/profiles/76561197989774972#!/compare/1606089600/1606694400

https://backpack.tf/item/4940589960 https://marketplace.tf/items/tf2/1117;5;u3017 - Doesn't help decipher which sale is which. Doesn't matter as there wasn't a buyout

Sales 2-4)

https://marketplace.tf/items/tf2/1117;5;u3017

$6.25 / $1.76 = 3.55 keys

$12.17 / $1.76 = 7 keys

$18.99 / $2.17 = 9 keys

Sales:

3.55, 7 and 9

Calling 3.55 low due to higher sales, the 7 key sale was the day after this sale for example

Calling 9 high due to lower sales and unsolds, despite being at 9 keys, a 2 month unsold suggests that 9 is a little too high, likely not help by the marketplace.tf closure, excluding one sale either end helps keep this a little more even too

Thanks =)