Sale 1:

Sold for Terror-Watt Killer’s Kabuto (43.5)

No outpost

Seller: https://backpack.tf/profiles/76561198301836632#!/compare/1498780800/1498867200

Buyer: https://backpack.tf/profiles/76561198111606680#!/compare/1498867200/1498953600

X = 44

Sale 2:

Sold for Terror-Watt Killer’s Kabuto…again (43.5)

No outpost

Seller: https://backpack.tf/profiles/76561198111606680#!/compare/1498867200/1498953600

Buyer: https://backpack.tf/profiles/76561198085269574#!/compare/1498867200/1498953600

Was not a tradeback. The guy got the kabuto from a different guy

X = 44

Sale 3:

Sold for Infernal Flames Box Trot (Suggestion at 38)

No outpost

Seller: https://backpack.tf/profiles/76561198115471878#!/compare/1498348800/1498521600

Buyer: https://backpack.tf/profiles/76561198088575044#!/compare/1498348800/1498521600

X = 38

Sale 4:

Sold for $76 on Marketplace.tf

https://marketplace.tf/items/30767;5;u9

https://backpack.tf/item/5327391954

76/2.03 = ~37.4

X = 37

Sale 5:

Sold for Screaming Tiger Disco Fever (35)

http://www.tf2outpost.com/trade/29197720 - B/O of 65

Seller: https://backpack.tf/profiles/76561198040812694#!/compare/1495929600/1496016000

Buyer: https://backpack.tf/profiles/76561198082061316#!/compare/1495929600/1496016000

X = 35

Sale 6:

Sold for Green Black Hole Baron von Havenaplane

No outpost

Seller: https://backpack.tf/profiles/76561198116102172#!/compare/1497571200/1497916800

Buyer: https://backpack.tf/profiles/76561198301836632#!/compare/1497484800/1497571200

Only valid sale I found on the Baron was a bulk sale. Should be used on the Baron instead.

Sale 7:

Sold for Chiroptera Venenata Bombing Run

http://www.tf2outpost.com/trade/29331390 - No visible B/O

Seller: https://backpack.tf/profiles/76561198050062763#!/compare/1503187200/1503273600

Buyer: https://backpack.tf/profiles/76561198170220043#!/compare/1503187200/1503273600

Not many sales on this either. Can be used on the bombing run.

Sale 8:

Bulk for things

Seller: https://backpack.tf/profiles/76561198125791160#!/compare/1500854400/1500940800

Buyer: https://backpack.tf/profiles/76561198375703304#!/compare/1500854400/1500940800

Infernal Flames Boxtrot:

https://backpack.tf/suggestion/599ed896cf6c7551144bc2d3

Sellers:

35 keys:

http://i.imgur.com/rMzlisS.png - 17 days

39 keys:

http://i.imgur.com/zm418xw.png - 2 months

47 keys:

http://i.imgur.com/lfuVQWz.jpg - 7 days

Sales at:

35

37

38

44 (2x)

2 month unsold at 39 shows that it doesn’t sell well for 39 or higher. Excluding 44.

Going with 35-38.