I'm unsure about Sale 2, it's inherently dodgy

Sale 1

http://www.tf2outpost.com/trade/26912913 Sold for Duped Sulph Le Party + 1 key + 6.4 keys of sweets

B/O for Belgian was 75

Le Party had no trade, presuming offered

X = 53*0.9 + 1 + 6.4*0.9

X = 54

Le Party http://backpack.tf/item/1712824850

Belgian http://backpack.tf/item/3167744783

Mini for Le Party

[No OP Trade] Sold with 9 keys of sweets for Ghosts Le Party

Sulph was clearly offered

X + 9 = 61.5

X = 53

Ghosts http://backpack.tf/item/604088893

Sulph http://backpack.tf/item/1712824850

Sweets https://gyazo.com/d321ca26a4ef16f0185b15f2dd093baf http://backpack.tf/profiles/76561198111891975?time=1441954800&compare=1442041200

Sale 2

Possibly sold with keys for a Duped Vivid Beret + G. Fetti Buckaroos, about 54 after overpay considering the beret as clean, but maybe ~49? if a duped mini is supplied

Problem is, with the histories the buyer's backpack was scanned 2 months apart so confirmation is very stupid and dodgy, and the buyer doesn't even appear in the Belgian history

For safety reasons I'll ignore this sale

Sale 3

Sold for Aussie Grenade and Aussie Sticky ~36

With the two other sales going near 50, I'll label this an outlier

There wasn't even a trade, maybe it was a quicksell, who knows?