Backback.tf's Mann Co. Supply Crate Key price has hit 50 refined for the first time | Second Generation
wickedplayer494 on Twitter: "Mann Co. Supply Crate keys have continued their upwards march. Although https://t.co/dmnJvBr8dS's price index has not yet been updated, spot prices are at a new eye-watering high water mark
Mann Co Supply Crate Key - Free TF2 Items - YouTube
I wrote a userscript that lets you see expired crate keys : r/tf2
Mann Co. Supply Crate Key | Wiki | Team Fortress 2 Amino