Updating the price, all credit goes to Lucazade; he found most of this proof. He just had the wrong range, and I'm here to fix it. ;D

http://www.tf2outpost.com/trade/14872579 Sold at 1 refined within the week.

http://www.tf2outpost.com/trade/14020863 Sold at 1 refined within the week

http://www.tf2outpost.com/trade/13878233 Sold plenty for a refined

http://www.tf2outpost.com/trade/12173013 Sold 22 at 1 refined each

http://www.tf2outpost.com/trade/13724133 Sold at least 4 in the past month at 1 refined each

More:

http://www.tf2outpost.com/trade/12022043 Sold plenty for 0.30 cents (~1 refined)

http://www.tf2outpost.com/trade/12154191 Sold 1 for 1.22 and was offered 1 refined.

http://www.tf2outpost.com/trade/15053433 Sold 1 for a refined