sale 1:

http://backpack.tf/profiles/76561198104065145/#!/compare/1459814400/1459900800

http://imgur.com/epn4P7U

Added strange crusaders (0.5) for searing plasma sober stunstman (19)+ duped max (29) + SF crusader (4) strange spec pistol (0.5)

x=17+29+4 = 52

Stuntsman mini:

http://backpack.tf/profiles/76561198226532564/#!/compare/1454400000/1454486400

Added ~2 keys in sweets for miami Tartan spartan (20.5)

x=18.5, ronding to 19

It is an old sale, however, the only usable one. So it should be alright.

Sale 2:

http://backpack.tf/profiles/76561198131758534/#!/compare/1459641600/1459814400

Added 3 keys for a galactic codex phononaut (43)

x=40

sale 3:

http://backpack.tf/profiles/76561198131758534/#!/compare/1459382400/1459468800

1:1 for a clean max (29.5)

Rounding to 30

Sale 4:

http://backpack.tf/profiles/76561198064077502/#!/compare/1459814400/1459987200

Added 3 keys, potasium bonnet (12) + 7 keys in killstreak items for Logo beak (57)

x+3+12+7=57, so x=35

sale 5: (not using)

Bulk for ge runner

http://backpack.tf/profiles/76561198071280729/#!/compare/1457938800/1458025200

Sale 6: (not using)

http://backpack.tf/profiles/76561198119666999/#!/compare/1457856000/1457938800

bulk for scorching stetson

Sales: 52, 40, 35, 30.

52 seems like an outlier, going with 30-40 here. Looks good compared to sulphurous price