Huge amount of proof.

http://www.tf2outpost.com/trade/8321373 (1.66 ref probably sold)

Unsold

http://www.tf2outpost.com/trade/8298424 (1.66 ref painted orange)

http://www.tf2outpost.com/trade/8376870 (2 ref) or (1 key for two) ~1.75 ref each

http://www.tf2outpost.com/trade/8376195 (2 ref painted olive)

http://www.tf2outpost.com/trade/8350679 (2.33 ref painted greed)

http://www.tf2outpost.com/trade/8294097 (2.33 ref, 4 days)

http://www.tf2outpost.com/trade/8133831 (2.66 ref, 1 week)

http://www.tf2outpost.com/trade/8308178 (2.66 ref, 3 days)

http://www.tf2outpost.com/trade/8374862 (2.66 ref)

http://www.tf2outpost.com/trade/8333862 (2.66 ref)

http://www.tf2outpost.com/trade/8323750 (2.66 ref)

http://www.tf2outpost.com/trade/8275278 (2.88 ref, 5 days)

http://www.tf2outpost.com/trade/8347236 (1 key minus 0.55 ref)

http://www.tf2outpost.com/trade/8156053 (3 ref, 1 week)

http://www.tf2outpost.com/trade/8227072 (3 ref, 1 week)

http://www.tf2outpost.com/trade/8206296 (3 ref, 1 week)

http://www.tf2outpost.com/trade/8198445 (2.66-3.33 ref, 1 week)

http://www.tf2outpost.com/trade/8273125 (3 ref, 5 days)

http://www.tf2outpost.com/trade/8369923 (3 ref)

http://www.tf2outpost.com/trade/8339948 (3 ref)

http://www.tf2outpost.com/trade/8375091 (3 ref)

http://www.tf2outpost.com/trade/8329951 (3 ref)

http://www.tf2outpost.com/trade/8365354 (1 key painted salmon)

http://www.tf2outpost.com/trade/8178507 (3.55 ref painted green, 1 week)