https://backpack.tf/item/12292435078

Backpack purchase:

https://backpack.tf/profiles/76561197978116445#!/compare/1744588800/1744675200

https://backpack.tf/profiles/76561198244962432#!/compare/1744588800/1744675200

Last sale is a MPTF sale, covering at the end

https://backpack.tf/item/12202075618 MPTF, covering at the end

https://backpack.tf/item/9555231589 Listed on Mannco.Store

https://backpack.tf/item/12298835520

Dumped to STN, nothing matches:

https://backpack.tf/profiles/76561198094858905#!/compare/1748908800/1748995200

https://backpack.tf/profiles/76561199564942025#!/compare/1748908800/1748995200

10 keys, sold within a day:

https://backpack.tf/profiles/76561199564942025#!/compare/1748908800/1748995200

https://backpack.tf/profiles/76561198835471580#!/compare/1747785600/1749945600

https://marketplace.tf/items/tf2/31153;5;u3088

April 11: $23.99/1.92=12.49 ~12 keys

May 21: $23.99/1.94=12.36 ~12 keys

June 2: $23.99/1.95=12.3 ~12 keys

Sellers at ~12 keys on mptf

https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20The%20Pooped%20Deck?filter=+Marigold+Ritual No sellers

Sales at 10, 12, 12, 12

10 sold within a day but I prefer including it since it's the only pure sale and pure sales should take precedence over cash sales. It also isn't that much lower than the MPTF sales and significantly above the current buyers at around 5 keys.

Going with 10-12 keys