I've gotten mine 2 days ago for about .22 ref. on a trade server. They're a lot of people selling them for .44 ref and even up to .66 ref, it is actually easy to find someone selling them for .22 ref. so i believe that the price should be lower than .66 and .33 ref since it isn't that rare.

Here are some links to help get my point. Some links are unsuccessful and some are successfull. Please note some might be out of date and might not explain or give adequate proof for the reason for the price suggestion so PLEASE look up all the links. MORE LINKS

http://www.tf2outpost.com/trade/8805995 (trades like these are both unseccessfull, and take great amount of patience and hard work)

http://www.tf2outpost.com/trade/8773517

http://bazaar.tf/trade/138546 (hi)

http://www.tf2outpost.com/trade/8803651

http://bazaar.tf/trade/137410

http://www.tf2outpost.com/trade/8808416

http://www.tf2outpost.com/trade/8731752 (links like this one shows other people that are buying have successfully bought one)

http://bazaar.tf/trade/141115

http://bazaar.tf/trade/107190

http://www.tf2outpost.com/trade/7800004

http://bazaar.tf/trade/136578

http://bazaar.tf/trade/143020 (My friend manage to get the guy to sell his baby for 2 scraps, NOW thats some dealing)