Sale 1 (Recent):

Bought this for 40 keys + spec ks aussie SMG(6.8 keys) + pro ks aussie axtinguisher(6.75 keys) + dead head(11.82) (65.5~) *Taking lowest sell order

Proof: https://prnt.sc/kga3oq

Sale 2 (1~ month ago):

43~ pure keys (about 70 ref after that, not sure if from the keys or his own)

Proof: https://prnt.sc/kga53x

https://backpack.tf/profiles/76561198247125544#!/compare/1532131200/1532217600

Sale 3 (2~ months ago):

About 86 keys in unusuals (jeepcap indate)

Proof: https://prnt.sc/kga8y2 https://prnt.sc/kgaa0x

https://backpack.tf/profiles/76561198050582650#!/compare/1528156800/1528416000

https://backpack.tf/profiles/76561198247125544#!/compare/1528329600/1528416000

____________________________________________________________________________________________________________________________________________

Mini for the Bitey:

https://backpack.tf/profiles/76561198160644852#!/compare/1531958400/1532476800 (35 key unusual)

https://backpack.tf/profiles/76561198065877115#!/compare/1529452800/1529539200 (10 keys and 39 key unusual rounds to 50)

http://www.tf2outpost.com/trade/29685436 (B/O of 50 keys)

http://www.tf2outpost.com/trade/29705294 (B/O of 37 keys)

https://backpack.tf/profiles/76561198393247820#!/compare/1530835200/1530921600 (40~ keys in unusuals)

https://backpack.tf/profiles/76561198352738720#!/compare/1529452800/1529625600 (Sold for KaW rotation (35) )

http://www.tf2outpost.com/trade/29700570 (37 keys)

https://gyazo.com/6154db31e417f55b199bd8e7e9f16343 (Sell and buy orders, about the 40~ range)

CONCLUSION: about 38.5 for the bitey

Micro for rotation: https://backpack.tf/profiles/76561198021055079#!/compare/1527206400/1527292800 (38 keys+2 keys sweets, rounding to 40)

Micro for noble: https://backpack.tf/profiles/76561198155066949#!/compare/1531180800/1531267200 (KaW fuka + spec ks market)

Micro for fuka: https://backpack.tf/profiles/76561198047389665#!/compare/1525996800/1526860800 (17 keys)

Ignoring the unusual trade that was 86 keys, we now have 2 pure trades at 43 and 65.5. Split in the middle would be 54.5, rounded up to 55.

I'm up for criticism, thanks a lot to JoXu for helping me a bunch.