Please excuse my mistake in that last one.

Sold for ~47.5 keys in three Unusuals:

https://backpack.tf/profiles/76561198360575389#!/compare/1516579200/1516838400

Sold for a Circling Heart Hat of Cards (priced at 74–91 keys [~82.5 keys]): https://backpack.tf/profiles/76561198121057673#!/compare/1517443200/1517529600

This price is nearly two years old, though, so it’s outdated by far.

Sold for $169.99 on Marketplace.tf:

https://marketplace.tf/shopitem/trainwithwayne/30182;5;u87/Frostbite%20L'homme%20Burglerre

Keys were $1.93 on Marketplace.tf at the time, so that equates to ~88.07 keys (rounded to 88 keys).

This sale is over a year old, though, so it’s far too old to be used.

Unsolds at 80 and 81 keys, respectively: https://i.imgur.com/z4QKa7D.png

Going with the first sale. Rounding ~47.5 keys to 48.