No price, not even in the unusual price list.

Sales

http://www.tf2outpost.com/trade/19719438 --> http://backpack.tf/vote/id/537588d14dd7b8df048b4ae0 --> http://puu.sh/8WdpP.png

-Sold for Misty Foolball + ~90 keys + sweets. 7+, but his b/o was 7. (As said in the suggestion, I guess)

http://www.tf2outpost.com/trade/19718414 --> http://puu.sh/8WdtC.png

-Pretty sure it was offered on, ~5.9 (6 for rounding)

http://www.tf2outpost.com/trade/19357410

-Sold for Bliz. Storm War Pig (~4.5) + 50 (2.6) keys so ~7.1 (7 to rounding)

Feel free to counter / support my proof. Vote based on proof presented, not blindly!