How Much are legendary keys are worth?

I have 4 legendary crate keys and was wondering if anyone knew how much they are equal to in terms of grass or diamonds?

 

1 Legendary Crate Key is 100 Diamonds/600 Grass.

Since you have 4 Legendary Keys, your price would be 400 Diamonds/2400 Grass.

 

Thanks that's what I heard just wanted to make sure and I'm glad I sold them for that much!