http://puu.sh/bMyrZ/d29def4c70.png - 3 keys

TF2OP

2 for offers

1 in a set, painted.

Seller:

http://www.tf2outpost.com/trade/22218211 (Currently offline at the time of suggestion, pending message on asking).

SCM

http://puu.sh/bMzSf/949ce23654.png - Minimal price sellers rounded to 3 keys (undercutting, etc.)

http://puu.sh/bMzWM/90b3018b1c.png - Most recently sold for 8.74

Other . . .

http://puu.sh/bMA3m/700d8f4bba.png - Inconclusive value, fairly outdated.

I would appreciate it if there are any other hidden sources of this item, or if you own one to let open your histories/sales. Thank you for looking at this suggestion.