Resuggestion from https://backpack.tf/suggestion/5f1f4fc3b250d5326b394237

Copy pasting proof as is because none of it is mine

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Proof by https://backpack.tf/u/76561198181820631

Vivid plasma price suggestion

Marketplace.tf stats

Last 2 months on marketplace.tf

https://marketplace.tf/items/tf2/31038;5;u16

1x 30th May @ $20.9 (10.77k)

1x 2nd June @ $20.9 (10.77k)

1x 29th June @ $19.99 (9.95k)

1x 4th July @ $21.11 (10.55k)

Last two month avg $20.72 (10.51k)

Bazaar.tf stats

One bot selling at 9k 50ref on bazaar

https://bazaar.tf/search?s=31038&sg=440&sp=quality%3D5%2Ceffect%3D16&b=&bg=&bp=

Steam community market stats

1 listed on steam community market for $30.01

Backpack Stats

https://backpack.tf/profiles/76561198335095206#!/compare/1590105600/1590192000 ~ 9k

Suggesting a low price of 10 keys because of bazaar and high of 11 because of marketplace

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Proof by https://backpack.tf/u/76561198156255538

Couple more sales:

https://backpack.tf/profiles/76561198287425707#!/compare/1590105600/1590278400

https://backpack.tf/profiles/76561198335095206#!/compare/1590105600/1590192000

7 keys

https://backpack.tf/profiles/76561198335095206#!/compare/1590192000/1590364800

https://backpack.tf/profiles/76561198387233985#!/compare/1590019200/1590278400

8 keys 40 ref

https://bot.tf/stats/listings/4O9G0WRQ

https://backpack.tf/item/7969127385

Bambook possibly sold for 9

I would call 7 low and go 9 - 11.

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Going with 9-11