~Team 3~

https://backpack.tf/item/4704666661

Sale 1) Sold for 50 Keys + ~1 Key of Items

https://backpack.tf/profiles/76561198241272522#!/compare/1488067200/1488240000

50 + 1 = 51 Keys

Sale 2) Sold for a Stormy Storm Brown Bomber (37.5 Keys) + 31 Keys

https://backpack.tf/profiles/76561198077739824#!/compare/1489017600/1489104000

37.5 + 31 = 68.5, which rounds to 69 Keys

https://backpack.tf/item/2091205407

Sale 3) Sold for 40 Keys

https://backpack.tf/profiles/76561198080179568#!/compare/1489363200/1489449600

https://backpack.tf/item/2172845045

Sale 4) Sold for a Sunbeams Otolaryngologist's Mirror (53.5 Keys)

https://backpack.tf/profiles/76561198068394220#!/compare/1491350400/1491436800

Rounding to 54 Keys

Mirror Mini

https://backpack.tf/suggestion/5906440ec4404506996e147a - 53.5 Keys

Counting 40 low because of 2 Classified Buyers, 69 high, and going 51 - 54.