Sellers

http://www.tf2outpost.com/trade/7035470 3 weeks old - unsold at 2keys/6ref

http://www.tf2outpost.com/trade/7265130 2 weeks old - unsold at 2keys+1ref

http://www.tf2outpost.com/trade/5202956 2 months old - unsold at 3keys/7.66ref

http://www.tf2outpost.com/trade/5564485 2 months old - unsold at 2keys+1.33ref, had someone wanting it 1 month ago

http://www.tf2outpost.com/trade/7505359 1 week old - unsold at 2keys+1.33ref

http://www.tf2outpost.com/trade/7208108 2 weeks old - unsold at 2keys+1ref

http://www.tf2outpost.com/trade/6981650 3 weeks old - presumably sold 2 at 2.5keys each

http://www.tf2outpost.com/trade/6955669 3 weeks old - unsold at 2keys+2ref, had someone wanting it 6 days ago

http://www.tf2outpost.com/trade/7654308 2 days old - unsold at 2.5keys

http://www.tf2outpost.com/trade/7256061 2 weeks old - unsold at 2keys+1.66ref

http://www.tf2outpost.com/trade/7524373 6 days old - unsold at 2keys+2ref

http://www.tf2outpost.com/trade/7552026 6 days ago - was asking for 2keys, sold in a different trade

http://www.tf2outpost.com/trade/7690154 less than 1 day ago - unsold at 2keys/6.44ref

http://www.tf2outpost.com/trade/7442061 1 week old - presumably sold for 2keys

Many unsold for 3keys(including one of mine): http://www.tf2outpost.com/search/67381647/

Buyers

http://www.tf2outpost.com/trade/7143350 2 weeks old - 2keys+1scrap, many people added, they stopped buying

http://www.tf2outpost.com/trade/7659076 2 days old - presumably bought for 2keys+1rec

There were only 15 buyer trades paying in keys/metal, most were quickbuyers: http://www.tf2outpost.com/search/67381639

Edit: I just dropped the price of mine to 2keys+0.66ref, time to see how that works out: http://www.tf2outpost.com/trade/7578919