One sale and an incredibly weird history. With lots of sharing, bulk sales, gifting, and sales of entire backpacks.

History : https://backpack.tf/item/11010496908 —> no other backbiters have been sold

Was sold for 225 pure + a Factory New Cool Psychedelic Slugger (120)

-Mini for Slugger : https://backpack.tf/profiles/76561198066701092#!/compare/1634428800/1634601600 was sold for 100 pure + gourdian angel shutter (17)

https://backpack.tf/profiles/76561198063640894#!/compare/1634428800/1634601600

-Mini for Gourdian: purchased for 36.51$ on October 11th, keys were 2.12$ at time off sale, therefore 36.51/2.12= 17.2 keys

https://imgur.com/a/OldDBmB

All other sales have either been Bulk, Gifts, or outright buys of backpacks