Nuts n’ Bolts Pugilist’s Protector

New price: 8 keys

[proof below]

SALE #1 = 8 keys

https://backpack.tf/profiles/76561198371722297#!/compare/1518912000/1519257600

Sold for 8 keys + 2 ref.

SALE #2 = 8 keys

https://backpack.tf/profiles/76561198166763414#!/compare/1518307200/1518393600

Sold for 8 keys + 5 ref.

SALE #3 = 8 keys

https://backpack.tf/profiles/76561198045661299#!/compare/1517356800/1517443200

Sold for 8 keys.

SALE #4 = invalid

https://marketplace.tf/items/246;5;u31

Sold for $16.99 ( / $1,90 ) = 9 keys. Too high here, compared to other sales and sellers.

SALE #5 = 8 keys

https://marketplace.tf/items/246;5;u31

Sold for $16.10 ( / $1,90 ) = 8 keys

SUMMARY

Sales: 8 / 8 / 8 / 8 keys

Sellers: 8 / 8 keys

https://gyazo.com/39d7f0abe11e5e911958e7cb28116285

Going with 8 keys.