Sellers (Only 4 pages on outpost):

2.33 Ref:

http://www.tf2outpost.com/trade/6618590 (Got an offer of 1 Key 5 days ago but gives change to 2.33)

http://www.tf2outpost.com/trade/6471957 (Same guy for 2.33 but another sandman which is sold for 2.33)

2 Ref:

http://www.tf2outpost.com/trade/5771347 (Old trade, got 1 comment 1 week ago who wants to buy one)

http://www.tf2outpost.com/trade/6932189 (Look at the last comment)

http://www.tf2outpost.com/trade/7272872

1.88 Ref:

http://www.tf2outpost.com/trade/7884471

1.66 Ref:

http://www.tf2outpost.com/trade/7830531

http://www.tf2outpost.com/trade/7953885

1.33 Ref:

http://www.tf2outpost.com/trade/7960388 (Nearly instantly sold, the only one I found who was willing to sell for 1.33)

Buyers:

http://www.tf2outpost.com/trade/7278906 (Quickbuyer for 1.33, got currently only 1 in his backpack, resells for 2 Ref)

http://www.tf2outpost.com/trade/7840782 (Another quickbuyer for 1.33, got 6 in his backpack but I think he got that much because he resells for 2.33 and it takes more time for this price.

http://www.tf2outpost.com/trade/7704958 (Unsuccesful for 1.33)

http://www.tf2outpost.com/trade/7894445 (Bought 1 for 1 Key)

http://www.tf2outpost.com/trade/7967328 (Bought 1 for 1.66)

http://www.tf2outpost.com/backpack/160320 (Another one unsuccesful for 1.33)