Sale 1) C.Heart Universal Translator - 27 keys

https://backpack.tf/profiles/76561198043657931#!/compare/1546387200/1548979200

Sale 2) Looks like a Motif with 24 keys for a Sunbeams Well Rounded Rifleman - outdated

The only recent sale I could find is this : https://backpack.tf/profiles/76561198095788662#!/compare/1542240000/1542412800 which gives nothing again

Sale 3) DBD Runner's , 5$ weapon skin, 5 keys and a 1 key taunt = 38 keys

https://backpack.tf/profiles/76561198393403738#!/compare/1548892800/1549065600

Sale 4) Sold with a Holy Grail Yeti Punch for a Peace Soldered Sensei and Searing Crit Cloak

https://backpack.tf/profiles/76561198105543135#!/compare/1546732800/1546819200

Sale 5) Blizzardy Snowcapped (used there https://backpack.tf/suggestion/5c5591c8cf6c7544f05e3d11)

Sale 6) 57 keys

https://backpack.tf/profiles/76561197964171516#!/compare/1548288000/1548547200

Sale 7) Energy Orb Sniper Rifle - unusable

https://backpack.tf/profiles/76561198042754411#!/compare/1545782400/1546041600

Alright, so. I think it's safe to say that neither of sales 1-3 were fair and usable due to lack of trading experience of the sellers or perhaps sharking took place. Sale 4 is unusable because Searing Crit cloak has no valid recent sales. Sale 7 is unusable, all sales are untracable. Two valid sales on this one are #5 and #6, the #5 cant be used tho ( link) so I guess we roll with 57 keys.

Tough one, if i missed something, let me know