MINI for Vivid Plasma Crack Pot - https://backpack.tf/suggestion/5e0802f391ff3a0e1720d061

Sale 1:

https://backpack.tf/item/8236089886

https://backpack.tf/profiles/76561198155371354#!/compare/1572739200/1572998400

https://backpack.tf/profiles/76561198158584845#!/compare/1572825600/1575676800

Untraceable

Sale 2:

https://backpack.tf/item/8218962696

https://backpack.tf/profiles/76561198293778105#!/compare/1572393600/1572566400

https://backpack.tf/profiles/76561198895602403#!/compare/1572220800/1572652800

Untraceable

Sale 3:

https://backpack.tf/item/8076317456

https://backpack.tf/profiles/76561198262121395#!/compare/1568246400/1571356800

https://backpack.tf/profiles/76561198345216182#!/compare/1571270400/1571356800

Untraceable

Sale 4:

https://backpack.tf/item/7287743225

https://backpack.tf/profiles/76561198435910422#!/compare/1556150400/1570147200

https://backpack.tf/profiles/76561198994206626#!/compare/1571529600/1571529600

Untraceable

Sale 5:

https://backpack.tf/item/8041730688

https://backpack.tf/profiles/76561198081907770#!/compare/1572480000/1572652800

https://backpack.tf/profiles/76561198208397087#!/compare/1572220800/1573344000

Untraceable

Sale 6:

https://backpack.tf/item/7230615729

https://backpack.tf/profiles/76561198140629045#!/compare/1571702400/1571875200

https://backpack.tf/profiles/76561198070713669#!/compare/1571702400/1571875200

Untraceable

Marketplace Sales

https://marketplace.tf/items/tf2/30844;5;u3026

Sale 7:

https://backpack.tf/item/6572414809

Sold on Dec 27th for $8, Keys were $1.79

Rounding 4.46~ Keys up to 4.5 Keys

Sale 8:

https://backpack.tf/item/7287743225

Sold on Nov 19th for $15, Keys were $1.77

Rounding 8.47~ keys up to 8.5 Keys

Sale 9:

Unable to locate history

Sold on Dec 6th for $6, Keys were $1.7

Rounding 6.52~ Keys down to 6.5 Keys

Excluding 8.5 as an outlier, going with 4.5-6.5 Keys