Team Fortress Classic for the Nintendo 64.

1st suggestion using an SCM sale.

Only sale, sold on the SCM the 23rd of September for 125$.

Proof of the sale from the graph at https://steamcommunity.com/market/listings/440/Unusual%20Berlin%20Brain%20Bowl, happened at 3AM: https://imgur.com/a/VvqEexc

Proof of the unusual sold from the seller's SCM history (money obtained is less because of the market fee): https://imgur.com/a/s1NuVyI

Proof of keys sold for 2.10$ at 3AM the 23rd of September: https://imgur.com/a/84YlXOn

125 : 2,10 = 59,52; rounding to 60 keys.

Thanks to Vege and Lucyfer for the help.

Credit to Reddeathgotyou for the proof.