4 pages in outpost , all of them are special levels and paints , only the below trades are real sales :

1- http://www.tf2outpost.com/trade/8890092 asking for items worths more than 1 key

2- http://www.tf2outpost.com/trade/8860129 rejected 1 key offer

3- http://www.tf2outpost.com/trade/8621643 didn't takes 1 key offer

4- http://www.tf2outpost.com/trade/8886020 rejected 1 key

5- http://www.tf2outpost.com/trade/8863273 sold for 1 key + 1 ref = 1.23 keys

6- http://www.tf2outpost.com/trade/8784081 selling for 2 keys

7- http://www.tf2outpost.com/trade/8735620 didn't takes 1 key offer

8- http://www.tf2wh.com/overstock.php tf2wh buying for 14740= 1.2 key and low stock

http://backpack.tf/market

Steam market average out of 27 sold is 1.24 keys, 4.69 ref