C. Bubbles Marauder is interesting...

Sale 1

http://www.tf2outpost.com/trade/27008382 Sold for Phos SnS + 3 keys + 0.8 keys of sweets

VRH was offered on SnS

B/O for SnS was 64

X = 64 + 0.8 + 3

X = 68

Stuff https://gyazo.com/0b2d66b851b7f50f1048c41f7194619c http://backpack.tf/profiles/76561198063134983?time=1442214000&compare=1442300400

SnS http://backpack.tf/item/1800535194

VRH http://backpack.tf/item/3158095760

Sale 2

http://www.tf2outpost.com/trade/26956790 Sold with a key + 1.5 keys of sweets for Duped C. Bubbles Marauder

B/O for VRH was 60

Marauder had no trade, presuming offered

X + 1 + 1.5*0.9 = 61

X = 59

Marauder http://backpack.tf/item/565251454

VRH http://backpack.tf/item/3158095760

Mini for Marauder

http://www.tf2outpost.com/trade/26779960 Sold for Ghosts Black Watch + 2.3 keys on sweets

B/O for Marauder was 60

B/O for Watch was 75

X = 65*0.9 + 2.3*0.9

X = 61

Watch http://backpack.tf/item/3409563792

Marauder http://backpack.tf/item/565251454

Watch has a B/O of 65 http://www.tf2outpost.com/trade/27079644 http://www.tf2outpost.com/trade/26967753 using 65