https://backpack.tf/stats/Unusual/Taunt%3A%20Disco%20Fever/Tradable/Craftable/3020

https://backpack.tf/profiles/76561197993262315#!/compare/1586736000/1587168000

https://backpack.tf/profiles/76561198260037335#!/compare/1586563200/1586908800

Unknown

https://backpack.tf/profiles/76561198260037335#!/compare/1587254400/1587340800

https://backpack.tf/profiles/76561198841279602#!/compare/1587254400/1587340800

Unknown

https://backpack.tf/profiles/76561198841279602#!/compare/1590624000/1590710400

https://backpack.tf/profiles/76561198352043216#!/compare/1590537600/1591747200

https://bot.tf/stats/listings/429G2LWZ

3k 14.88 = Excluding

https://backpack.tf/profiles/76561198352043216#!/compare/1591747200/1591920000

https://backpack.tf/profiles/76561198307610631#!/compare/1591833600/1592006400

Bulk

https://backpack.tf/profiles/76561198307610631#!/compare/1592092800/1592179200

https://backpack.tf/profiles/76561198077859721#!/compare/1592179200/1592265600

No clue

https://backpack.tf/profiles/76561198422094914#!/compare/1585526400/1586908800

https://backpack.tf/profiles/76561198216561389#!/compare/1585440000/1585526400

No clue

https://backpack.tf/profiles/76561198216561389#!/compare/1586908800/1586995200

https://backpack.tf/profiles/76561198820155661#!/compare/1586822400/1586995200

Use on paint

https://backpack.tf/profiles/76561198820155661#!/compare/1586995200/1587168000

https://backpack.tf/profiles/76561198244409420#!/compare/1587081600/1587168000

Use there

https://backpack.tf/profiles/76561198244409420#!/compare/1587340800/1587600000

https://backpack.tf/profiles/76561198863771054#!/compare/1576886400/1587340800

Bulk

https://backpack.tf/profiles/76561198863771054#!/compare/1587340800/1588550400

https://backpack.tf/profiles/76561198090918877#!/compare/1587254400/1587340800

Bulk

https://backpack.tf/profiles/76561198345158758#!/compare/1587427200/1587513600

https://backpack.tf/profiles/76561198090918877#!/compare/1587340800/1587513600

I would say it is 3 keys = Excluding

https://backpack.tf/profiles/76561198345158758#!/compare/1588118400/1588550400

https://backpack.tf/profiles/76561197969553134#!/compare/1574294400/1588982400

SCM Sale = No clue

https://marketplace.tf/items/tf2/30762;5;u3020

$6.6 / $1.69 = 3.91 keys Mar 27

2x $6.6 / $1.69 = 3.91 keys Mar 28

$6.55 / $1.82 = 3.60 keys April 30

$6.75 / $1.93 = 3.50 keys May 26

Seeing buyorders on mptf makes it seems like 3.6-3.9 is a common trading point for this item regardless of buyorders since higher sellers hasnt moving and 4 keys sellers are unsold on class