Halloween Spell: Spectral Spectrum.

Selling @ 15 keys:

http://www.tf2outpost.com/trade/14371743 - 2 weeks ago - Sold 1

http://www.tf2outpost.com/trade/9776018 - 5 months ago

http://www.tf2outpost.com/trade/14702742 - Young

http://www.tf2outpost.com/trade/14595777 - 5 days ago

http://www.tf2outpost.com/trade/14446777 - 1 week ago - Last bumped 4 days ago

http://www.tf2outpost.com/trade/14472596 - 1 week ago - Last bumped 1 day ago

http://www.tf2outpost.com/trade/11678424 - 3 months ago

http://www.tf2outpost.com/trade/14697652 - Young

http://www.tf2outpost.com/trade/14617959 - 14 keys - 4 days ago

http://www.tf2outpost.com/trade/13504527 - 16 keys - 1 month ago

http://www.tf2outpost.com/trade/13363569 - 16 keys - 1 month ago

http://www.tf2outpost.com/trade/12433780 - 16 keys - 2 months ago - Sold some, but a long time ago

http://www.tf2outpost.com/trade/14501038 - 16 keys - 1 week ago - Not sure...

Just kicking out 16.5 keys since nobody is selling it at that price. It seems that a conservative drop is good on this one. :)

~Roller