The buyer @1.15 who bought one in the last 14 days is a relister so it's not certain that it bought the key in question at its current price. Not sure if it can be counted as a legit sale because of this, but considering the large amounts of keys the buyers @1.15 have acquired over time 1.2 flat would seem a bit too high.
Sale @1.2: https://i.imgur.com/Gc3ru0o.png
Sale @1.15: https://backpack.tf/profiles/76561198386441509#!/compare/1553212800/1553299200 - https://i.imgur.com/fIidzPO.png
The buyer @1.15 who bought one in the last 14 days is a relister so it's not certain that it bought the key in question at its current price. Not sure if it can be counted as a legit sale because of this, but considering the large amounts of keys the buyers @1.15 have acquired over time 1.2 flat would seem a bit too high.