Sale 1:

Sold for blizz front runner (~20) + 10 keys

http://www.tf2outpost.com/trade/27489852

http://backpack.tf/profiles/76561198028102463?time=1448352000 before

http://backpack.tf/profiles/76561198028102463?time=1448438400 after

http://backpack.tf/profiles/76561198028102463?time=1448438400&compare=1448352000

http://backpack.tf/profiles/76561198084178130?time=1448265600&compare=1448438400

0.9*20 +10 = 28

-> 28 keys

Sale 2:

Sold for ks S.f sniper + 10 keys

http://backpack.tf/profiles/76561198068495070?time=1448438400&compare=1448352000

Probably really low, sniper is ~11, which would make this ~20

Sale 3:

Sold for spec aussie medgun (~26) + spec S.f eyelander (~4) + strange brickhouse (FN) (~1)

http://www.tf2outpost.com/trade/27449243

http://backpack.tf/profiles/76561198068495070?time=1448006400&compare=1448092800

http://backpack.tf/profiles/76561198065400580?time=1448006400&compare=1448092800

medgun was resold for S.kritz +12 keys

26 + 0.9*5 = ~31

-> 31 keys

theres a few other weird/complex/unclear sales that are probably not usable

Complex sale involving that led, but other stuff was involved so eh

http://backpack.tf/profiles/76561198079816783?time=1447056000&compare=1447228800

No idea what this went for

http://backpack.tf/profiles/76561198117577469?time=1447315200&compare=1447401600

probably keys but idk how many

28-31 can work here

[ THX Strange Festive Foam Rifle ]