Challenge 19, Team F.L.A.M.B.E.S!

30th suggestion, made by Beaser!

https://marketplace.tf/items/tf2/30836;5;u7

$12.49 / $1.87 = 6.68 keys

$15 / $1.88 = 7.98 keys

$12.99 / $1.89 = 6.87 keys

$14.99 / $1.98 = 7.57 keys

$14.99 / $2.00 = 7.50 keys

$10.02 / $2.00 = 5.01 keys

Only found one of the histories https://backpack.tf/item/8111725956

3 sales at 6 keys

https://imgur.com/uR5gwMz

Sale #1 -

5 keys 28 ref

https://backpack.tf/profiles/76561199057051061#!/compare/1591660800/1591747200

https://backpack.tf/profiles/76561198080179568#!/compare/1591660800/1591747200

Sale #2 -

QS

https://backpack.tf/profiles/76561198352457232#!/compare/1591833600/1591920000

https://backpack.tf/profiles/76561198080179568#!/compare/1591747200/1591833600

Sale #3 -

Sold for either Norman or Chief, can't tell

https://backpack.tf/profiles/76561199043176336#!/compare/1591920000/1592611200

https://backpack.tf/profiles/76561199043176336#!/compare/1591920000/1592611200

Sale 4:

https://backpack.tf/profiles/76561198080179568#!/compare/1592870400/1592956800

https://backpack.tf/profiles/76561198137909800#!/compare/1591920000/1592956800

bulk

sale 5:

https://backpack.tf/profiles/76561198080179568#!/compare/1592092800/1592179200

https://backpack.tf/profiles/76561198850178158#!/compare/1592006400/1592092800

Untrace

sale 6:

https://backpack.tf/profiles/76561199043176336#!/compare/1592611200/1592956800

https://backpack.tf/profiles/76561199021119650#!/compare/1592438400/1592784000

Untrace

Sale 7:

https://backpack.tf/profiles/76561199021119650#!/compare/1592784000/1592870400

https://backpack.tf/profiles/76561198841279602#!/compare/1592697600/1592870400

QS

Sale 8:

https://backpack.tf/profiles/76561198341171690#!/compare/1592438400/1592524800

https://backpack.tf/profiles/76561198121899381#!/compare/1592438400/1592524800

Can trace 4 keys

Sale 9:

https://backpack.tf/profiles/76561198996047364#!/compare/1589932800/1590019200

https://backpack.tf/profiles/76561198341171690#!/compare/1589932800/1590019200

QS

sale 10:

https://backpack.tf/profiles/76561198850274253#!/compare/1589760000/1589846400

https://backpack.tf/profiles/76561198996047364#!/compare/1589846400/1589932800

Untrace

sale 11:

https://backpack.tf/profiles/76561198037674114#!/compare/1586995200/1587254400

https://backpack.tf/profiles/76561198020673987#!/compare/1587081600/1587254400

https://backpack.tf/profiles/76561198020673987#!/compare/1588118400/1588204800

Untrace / bulk / QS

Sale 12:

https://backpack.tf/profiles/76561198341171690#!/compare/1592611200/1592697600

https://backpack.tf/profiles/76561198357099406#!/compare/1591660800/1592784000

Untrace

sale 13:

https://backpack.tf/profiles/76561198985910282#!/compare/1586390400/1586476800

https://backpack.tf/profiles/76561198126507963#!/compare/1586304000/1586476800

Keys?

sale 14:

https://backpack.tf/profiles/76561198880361166#!/compare/1585785600/1586044800

https://backpack.tf/profiles/76561198834678807#!/compare/1586217600/1586476800

https://backpack.tf/profiles/76561198026129220#!/compare/1587686400/1587859200

Untrace / bulk

Most sales are either untrace or bot dumps, 3 sellers below 6 keys https://imgur.com/CRVEBQ9

Sales at 5, 5.5, 6.5, 7, 7.5, 7.5, 8, excluding 5 and 8, taking 5.5 - 7.5