I will do a suggestion for every possible massed flies hat so it gets next to nuts and bolts where it belongs!

Sale # 1:

https://backpack.tf/profiles/76561198131620766#!/compare/1501891200/1501977600

Sold with 2.5 Keys in sweets for a Strange Professional Killstreak festive Scattergun with a few Parts (~20)

20-2.5= 17.5

Sale # 2:

https://backpack.tf/profiles/76561198070833547#!/compare/1502150400/1502236800

Cashout for his Inventory

Sales: 17.5

Rounding 17.5 to 17 because the Scattergun is likely a little lower

Sale at 21 keys pure here:

https://backpack.tf/profiles/76561198061836787#!/compare/1501372800/1501545600 (Thanks King)