Hello, I just purchased this for 107 USD from the Steam Community Market

Proof of purchase:

https://i.imgur.com/iw1yukV.png

Screenshot of the listing before purchase:

https://i.imgur.com/xIi04Np.png

Current price of keys on the community market is about 2.15 to 2.16 USD at the time of my purchase

I'll take 2.15 USD as the current key price:

https://i.imgur.com/ew8aME8.png

Calculation:

107 / 2.15 = ~49.767 keys

Rounding it up to 50 keys

Thank you for reading this and have a pleasant day!