Why are 3/5 of these with recent sales duped :c

Sale 1:

Sold for a Searing stash and 10 keys

(110*0.9) + 10 = 109 rounding to 110 keys

http://www.tf2outpost.com/trade/26374715 - offered

http://backpack.tf/profiles/76561198049192995?time=1435993200

http://backpack.tf/profiles/76561198049192995?time=1436079600

Sale 2:

Sold for a Burning Flames Triboniophorus Tyrannus and 10 keys

(Used on the suggestion up currently to raise the Tryannus, so I can’t use it here)

Was an outlier there, so could be an outlier here as well

Sale 3: (outlier)

Sold for 70 mixed, definitely an outlier

http://backpack.tf/profiles/76561198048754056?time=1431586800

http://backpack.tf/profiles/76561198048754056?time=1431673200

Notes:

Mini for the Stash: http://backpack.tf/vote/id/55b67f5cb98d8834758b4567 ~110

Conclusion:

There seems to only be one recent usable sale at 110, so I am taking my price at that.