159 Exist.

Extremely hard to sell at 2.5, Many for 2.2-2.4, EXTREMELY easy to find at 2, possible to find under 2

http://backpack.tf/classifieds/search/id/528305b44dd7b81f2c8b4567

1 unsold at 1.8 keys (2 days)

2 unsold at 2 keys (1 hour, 22 hours)

3 unsold at 2.5 keys (new, 2 days, 2 days)

For the sake of simplicity, I am going to round 2.15 / 2.3

Keys = 6.22

~1.8 Keys = 1 Key + 5 Ref

~2 Keys = 2 Keys

~2.2 Keys = 2 Keys + 1 Ref

~2.3 Keys = 2 Keys + 2 Ref

~2.5 Keys = 2 Keys + 3 Ref

Unsold at 2.5

http://www.tf2outpost.com/trade/15934607 - 1 day

http://www.tf2outpost.com/trade/15939678 - 1 day, remade trade

http://www.tf2outpost.com/trade/15955614 - 7 hours, gave up selling for 2.5*, now selling for 2 keys

http://www.tf2outpost.com/trade/15956392 - 6 hours, bumped

http://www.tf2outpost.com/trade/15961366 - 2 hours, autobumped

http://www.tf2outpost.com/trade/15961445 - 2 hours, bumped

Unsolds, sellers under 2.5

http://www.tf2outpost.com/trade/15934906 - 2 keys + 2 ref

http://www.tf2outpost.com/trade/15867168 - Sold for chem set?!, gave up trying to sell for 2 keys + 1 ref

http://bazaar.tf/trade/552268 - 2 keys + 2 ref

http://www.tf2outpost.com/trade/15927330 - 2 keys + 1 ref

http://www.tf2outpost.com/trade/15929692 - 2 keys + 1 ref

http://tf2tp.com/trade.php?trade=9909864 - 2 keys + 1 ref

http://www.tf2outpost.com/trade/15928270 - 2 keys, sold

http://www.tf2outpost.com/trade/15940197 - 2 keys, 1 day

http://www.tf2outpost.com/trade/15938743 - 2 keys, 1 day

http://www.tf2outpost.com/trade/15927435 - 2 keys, closed

http://www.tf2outpost.com/trade/15915116 - 2 keys, 1 day

http://www.tf2outpost.com/trade/15913183 - 2 keys, 1 day

http://www.tf2outpost.com/trade/15963377 - 2 keys, extremely young*

http://www.tf2outpost.com/trade/15963377 - 2 keys, extremely young

http://www.tf2outpost.com/trade/15962813 - 2 keys, extremely young

http://www.tf2outpost.com/trade/15921266 - 2 keys gave up trying to sell for 2 keys*

http://tf2tp.com/trade.php?trade=9908253 - 1 key + 3 ref

Sellers under 2 keys

http://www.tf2outpost.com/trade/15921868 - 1 Key + 5 ref (quicksell

http://tf2tp.com/trade.php?trade=9908253 - 1 Key + 3 ref (quicksell)

Price suggestions, range adjustments, additional proof, discussion are all appreciated.