Sales below 2,33 :

http://www.tf2outpost.com/trade/21080683 - 2

http://www.tf2outpost.com/trade/21071218 - 2

http://www.tf2outpost.com/trade/21074011 - 2

http://bazaar.tf/trade/896005 - 2

http://www.tf2outpost.com/trade/21008408 - Sold out at 2

http://bazaar.tf/trade/895347 - 2

http://www.tf2outpost.com/trade/21072821 - 2

http://www.tf2outpost.com/trade/21073184 - 2

http://bazaar.tf/trade/895347 - 2

http://www.tf2outpost.com/trade/21051074 - 2

http://www.tf2outpost.com/trade/21039023 - 2

http://www.tf2outpost.com/trade/21059653 - 2 (Not in bp)

http://www.tf2outpost.com/trade/21062847 - 2

http://www.tf2outpost.com/trade/21069053 - 2,11

http://www.tf2outpost.com/trade/21085077 - 2,22

http://www.tf2outpost.com/trade/21048579 - Almost out of stock at 2,22

http://www.tf2outpost.com/trade/21056523 - 2,22

http://www.tf2outpost.com/trade/21066212 - 2,22

As you can see pretty much everything below 2,33 ref is a quicksell.

Buyers at 2 :

http://www.tf2outpost.com/trade/21089697 - Me, lol (Add me)

http://www.tf2outpost.com/trade/20084561

Sales at 2,33 :

http://www.tf2outpost.com/trade/21072245

http://www.tf2outpost.com/trade/21069351

http://www.tf2outpost.com/trade/21065614

http://www.tf2outpost.com/trade/20951164

http://www.tf2outpost.com/trade/20879178

http://www.tf2outpost.com/trade/20917552 - Sold 2

http://www.tf2outpost.com/trade/20843913

http://www.tf2outpost.com/trade/21015869 - Sold 2

http://www.tf2outpost.com/trade/21076162

http://www.tf2outpost.com/trade/21068652 - Sold 3

http://www.tf2outpost.com/trade/20985233

http://www.tf2outpost.com/trade/21021699 - Sold 2

http://www.tf2outpost.com/trade/21028307

http://www.tf2outpost.com/trade/20779983 - Sold some

http://www.tf2outpost.com/trade/21043818

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http://www.tf2outpost.com/trade/20667591 - Willing buyer at 2,33

My sales :

#1

http://i.imgur.com/4p8NdPw.png, http://i.imgur.com/5zkItvF.png - I sold 38 bp expanders for 88 ref which is ~2,33 each (It's 0,55 off but that's because he buyed in bulk)

#2

http://i.imgur.com/ma81zvI.png - I sold 17 bp expanders for 3 keys, 16 ref, 1 rec or 42 ref (keys taken as 8,55)

10 sold at 2,33 and 7 at 2,66 = 23,33 + 18,66 = 42 ref*

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*If you are wondering how come some sold at 2,33 and some at 2,66... Here's the deal: I wanted to sell only 10 at 2,33 but he needed them a lot so he payed 2,33 each for the 10 and the rest at 2,66.

Sales above 2,33 :

http://www.tf2outpost.com/trade/20703424 - 2,66 (Sold some)

http://www.tf2outpost.com/trade/20683218 - 2,66 (Sold some)

http://www.tf2outpost.com/trade/20633381 - 2,66 (Sold some)

http://www.tf2outpost.com/trade/20980763 - 2,66 (Have an add)

http://www.tf2outpost.com/trade/20700272 - 3 (Sold some)

Conclusion :

As you can see sales happen above and below 2,33 ref. Anything below 2,33 ref sells quick. If it's still not sold at 2 probably the seller is afk. 2,33 sells well too. Suggesting 2,33 flat. Extra proof is highly appreciated.