Out of your "sellers below 2 ref"

http://www.tf2outpost.com/trade/25514615 - has had no stock since march 30th (1.55, see [url]http://backpack.tf/profiles/76561198084081254?time=1427698800[/url])

http://www.tf2outpost.com/trade/25544784 - quicksold (1.77)

http://www.tf2outpost.com/trade/25457580 - quicksold (1.77, this is the sale you provided - defies your own point)

http://www.tf2outpost.com/trade/25541294 - closed (1.77)

http://www.tf2outpost.com/trade/25305036 - ancient trade, sold ages ago

http://www.tf2outpost.com/trade/25545279 - inactive (1.88)

"unsold at 2 ref"

http://www.tf2outpost.com/trade/25475910 - quicksold

http://www.tf2outpost.com/trade/25531570 - sold

http://www.tf2outpost.com/trade/25504965 - sold

http://www.tf2outpost.com/trade/25402348 - sold

http://www.tf2outpost.com/trade/25543579 - sold

http://www.tf2outpost.com/trade/25473254 - inactive (unbumped for a week, has buyers)

http://www.tf2outpost.com/trade/25508752 - inactive

http://www.tf2outpost.com/trade/25522819 - inactive

http://www.tf2outpost.com/trade/25527921 - badly bumped

http://www.tf2outpost.com/trade/25527510 - ^^

also, some further sales at 2 ref:

http://www.tf2outpost.com/trade/25566340

http://www.tf2outpost.com/trade/25563213

and some more recent sellers below 2:

http://www.tf2outpost.com/trade/25562187 - 1.66, got a buyer shortly after being posted, user is inactive

http://www.tf2outpost.com/trade/25549694 - quicksold for 1.88

http://www.tf2outpost.com/trade/25566937 - buyer for 2 ref

I don't see any reason to include 1.66-1.88 in the range