https://steamcommunity.com/market/listings/440/Collector%27s%20Bat%20Outta%20Hell

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

Sold on February 25 for $195.50 = 82 keys

https://marketplace.tf/items/939;14;kt-3/Professional%20Collector's%20Bat%20Outta%20Hell

Sold on March 1 for $99.99 / 1.78 = 56 keys

Sold on March 1 for $35.00 = definite outlier to a buy order

Sold on March 8 for $99.99 / 1.80 = 56 keys

https://backpack.tf/classifieds?item=Bat+Outta+Hell&quality=14&tradable=1&craftable=1&australium=-1

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

https://backpack.tf/item/2669403907

The March 1st 56 key seller's buyout was 55 keys.

It took six months for it to sell for $99.99. I've been watching it since at least December, because that's when I was searching for and obtained a personal Bat Outta Hell.

Calling the 82 a very high outlier and going with 55-56.