This needs a drop.

Classified ads at the time of posting:

http://m.imgur.com/TmOiufl

http://backpack.tf/classifieds?item=Abhorrent+Appendages&quality=13&tradable=1&craftable=1

1*1.42 keys (Painted Drab)

1*1.84 keys

4*2 keys (2 are painted Gold)

Unsolds at 2 keys:

http://www.tf2outpost.com/trade/26204628 (~1 month)

http://www.tf2outpost.com/trade/26413097 (~3 days)

http://www.tf2outpost.com/trade/26309325 (Painted Gold, ~2 weeks)

Unsold at 1 key and 14 refined (~1.9 keys):

http://www.tf2outpost.com/trade/26434500 (~1 day, young)

Seller at 1 key and 13 refined (~1.8 keys):

http://www.tf2outpost.com/trade/26436669 (~1 day old)

This is all I could find on Outpost that are valid at the time of posting this suggestion.