Previous suggestion was before the crate bug deppression. These unusuals went from 6 to 21 in circulation !

MP sales

https://marketplace.tf/items/tf2/30553;5;u62

2 recent sales at $40, excluding the $54 sale because of the month unsold at 24 k in classies & with the 2 sellers on MP below $44 -> 23 keys (with values of the keys at the time)

Non-usable sales

https://backpack.tf/item/7956237666 : only gambled or QS on scrap

https://backpack.tf/item/7955791673 :

https://backpack.tf/profiles/76561198192602363#!/compare/1574899200/1574985600 15k QS (became tradable the 29th, so sales ~20€ around the 22nd on SCM are non valid too)

https://backpack.tf/profiles/76561198081240505#!/compare/1573948800/1574035200 16k QS (quickbuyer at 16 in classies) ID of the keys are matching with https://backpack.tf/item/7957318821

Any pertinent comments are welcome.