Buyers are refusing to buy at the original price, and who can blame them? It's 9 months old.

6 Trades on TF2 Outpost, one selling in a set:

http://www.tf2outpost.com/search/154749709

Selling for 1 key, added by multiple people:

http://www.tf2outpost.com/trade/13159831

Trader offered 1 key, buyer accepted:

http://www.tf2outpost.com/trade/9401515

Selling for one key, buyer agreed:

http://www.tf2outpost.com/trade/10902119

While the trader did not offer a price, a buyer offered 2 keys for this spell and the Spectral Flame (priced at one key)

http://www.tf2outpost.com/trade/13581259

I hope this is enough proof. Comments and counterproof are greatly appreciated.