Too large of a range?

Sale 1

http://www.tf2outpost.com/trade/28057910 Sold for Spec KS Aussie Amby + Spec KS Aussie Sticky + 7 keys in sweets

B/O for Billy was 40

B/O for Sticky was 21

X = 7 + 19 + 18

X = 44

X = 40 (B/O)

Amby http://backpack.tf/item/3970732325

Sticky http://backpack.tf/item/4571953499

Billy http://backpack.tf/item/1649395325

Trade http://backpack.tf/profiles/76561198030050182/#!/compare/1460160000/1460246400 http://imgur.com/a/BI2mx

Sale 2

http://backpack.tf/profiles/76561198078986177/#!/compare/1456646400/1456732800 Bulk for Aces TC

Sale 3

http://backpack.tf/profiles/76561198074192315/#!/compare/1455955200/1456041600 Bulk for PE Bomber

Sale 4

http://backpack.tf/profiles/76561198225463104/#!/compare/1455609600/1455696000 Sold with 8 keys of sweets for a Max, was looking for a Max, low

Sale 5 LOW

http://www.tf2outpost.com/trade/27895948 Sold for Aces Scopers + 4 keys

X = 25 + 4

X = 29

Scopers http://backpack.tf/item/2587238903

Billy http://backpack.tf/item/1649395325

Trade http://backpack.tf/profiles/76561198078986177/#!/compare/1456473600/1456560000

Sale 6

http://www.tf2outpost.com/trade/28087752 Sold for Aces Chilli Chullo

B/O for Billycock was 40 as shown in my previous suggestion

X = 40

Chullo http://backpack.tf/item/4441044078

Billy http://backpack.tf/item/1649395325

Trade http://backpack.tf/profiles/76561198129088942/#!/compare/1461024000/1461110400