— Useable Sales —

https://backpack.tf/profiles/76561198064249290#!/compare/1679702400/1679875200 - 4 Keys?

Item History - https://backpack.tf/item/9643038361

https://backpack.tf/profiles/76561199162213236#!/compare/1685318400/1685404800 - 6 Keys

https://backpack.tf/profiles/76561198314776045#!/compare/1685318400/1685404800 - 6 Keys (Other Item they sold is Untrace)

Item History - https://backpack.tf/item/8958799658

— Gladiator.tf Stats —

June - 4 Keys

https://gladiator.tf/sales?item=Marigold%20Ritual%20Taunt:%20The%20Balloonibouncer&at=2023-06-02T02:13:55.055Z

May - 4 Keys 36 Ref

https://gladiator.tf/sales?item=Marigold%20Ritual%20Taunt:%20The%20Balloonibouncer&at=2023-05-02T02:13:55.055Z

April - 5 Keys 28 Ref (x2)

https://gladiator.tf/sales?item=Marigold%20Ritual%20Taunt:%20The%20Balloonibouncer&at=2023-04-02T02:13:55.055Z

March - Empty

https://gladiator.tf/sales?item=Marigold%20Ritual%20Taunt:%20The%20Balloonibouncer&at=2023-03-02T02:13:55.055Z

— Unusable Sales —

https://backpack.tf/profiles/76561199107865875#!/compare/1679788800/1679875200 - Untrace

https://backpack.tf/profiles/76561199107865875#!/compare/1682985600/1683072000 - Too Many Sales

https://backpack.tf/profiles/76561198088316707#!/compare/1682985600/1683072000 - Untrace

Item History - https://backpack.tf/item/9643038361

https://backpack.tf/profiles/76561198339572476#!/compare/1684368000/1684454400 - Untrace

https://backpack.tf/profiles/76561199018795028#!/compare/1684368000/1684454400 - Bulk

https://backpack.tf/profiles/76561199018795028#!/compare/1684627200/1684886400 - Untrace

https://backpack.tf/profiles/76561199162213236#!/compare/1684540800/1684886400 - Untrace

Item History - https://backpack.tf/item/8958799658

— Unusable Marketplace.tf Sale —

Unu May 20 : 19.99 || Key May 20: 2.02 || Total - 10

Marigold Ritual Balloonibouncer -

https://marketplace.tf/items/tf2/30763;5;u3088

Mann Co. Supply Crate Key -

https://marketplace.tf/items/tf2/5021;6

— Conclusion —

10 Keys seems like an Outlier due to the amount of sales at 4-6

As well as most S/Os at 5-8 with only one at 15 Keys

https://gladiator.tf/time-machine?item=Marigold+Ritual+Taunt%3A+The+Balloonibouncer&at=2023-05-18T01%3A37%3A00.000Z