Believe this could do with a range. Searching sellers on OP, could only find 1 going for 2 keys. Lots asking for 3 keys but not making sales. Some buyers are offering 2 keys but with little luck.

While my links don't prove that it sells for 3 keys, that is what the majority of sellers are asking for. 2 key offers are shot down so I can assume that it goes quickly for that price. For those reasons, I think it could do with abit of a rise.

2 keys/7ref

http://www.tf2outpost.com/trade/8089552 (Buyer. 2 adds in 1 week)

http://www.tf2outpost.com/trade/8320080 (Buyer. No add in 3 days)

http://www.tf2outpost.com/trade/8347033 (Buyer. No add in 2 days)

http://www.tf2outpost.com/trade/8241677 (Seller. Sold)

http://www.tf2outpost.com/trade/8102226 (Buyer. No add in 1 week)

3 keys

http://www.tf2outpost.com/trade/8339244 (2 keys & 3 ref. Not in his BP. Sold?)

http://www.tf2outpost.com/trade/8201249 (3 keys. 2 key offers rejected. Unsold)

http://www.tf2outpost.com/trade/8324030 (3 keys. 2 key offers rejected. Unsold)

http://www.tf2outpost.com/trade/6750059 (3 keys. 2 key offers rejected. Unsold)

http://www.tf2outpost.com/trade/8286096 (3 keys. Painted white. Sold)

http://www.tf2outpost.com/trade/8317859 (3 keys. Unsold)

http://www.tf2outpost.com/trade/7241675 (3 keys. 2 key offers rejected. Unsold)

http://www.tf2outpost.com/trade/8275367 (3 keys. 2 key offers rejected. Unsold)