Well, this guy currently has no price.

I paid 3.66 Ref for the Uncraftable Intellectual, and 6 Ref for the Strangifier. So about 9.66 Ref (1.3 Keys). Almost none in existence and none for sale. I found another sale but, it was 1.8 Keys which seems like a too great of a price range compared to this one.

Low end - 1.1 Keys (The most recent sale)

High end - Me paying 1.3 Keys for the outback and strangifier

This is my first suggestion, so go easy on me ^_^

Sale:

http://www.tf2outpost.com/trade/17750013 (1.1 Keys rounded)