i have a mann co key in my incentory and the system is not recognizing it.

[cashmon 8]

basically the key selling this is saying i don't have keys when for a fact i do, why?

[iLteiko]

Your key is not tradable

[a cinnamon roll]

Hello, It appears that the key may not be tradable because either you bought it through the mann co store (the in game store) or the steam market. Which has a 1 week trade lock so that people don’t bot them or scam others. There is a specific date when you can trade these keys, so make sure to check the description on the key. Demonstrated on the photo.