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https://backpack.tf/item/12511591955
https://marketplace.tf/items/tf2/31329;5;u278
89.99+75=164.99
164.99/2=82
Price per key 2$
82/2=41keys
I don't understand your math. Where does 89.99 come from
edit: ah yeah I'm seeing the 2nd sale now. As said, don't average sale values. Make a range and eliminate outliers (if any)
There are 2 sales. Calculate them individually not as a one