This thing (especially clean) is very hard to find for 1.33 and there is a relative lack of them for trade. Thus it was quite hard to find proof but it should be higher. I've only done 1 suggestion before so i would love some tips.

Proof

Quicksells

http://www.tf2outpost.com/trade/1773854 (1.33ref)

http://www.tf2outpost.com/trade/17762994 (1.33 ref)

http://www.tf2outpost.com/trade/17179861 (1.33 ref)

Unsolds

http://www.tf2outpost.com/trade/17653414 (1 key)

http://www.tf2outpost.com/trade/3236531 (1 key)

http://www.tf2outpost.com/trade/16425421 (1 key)

http://www.tf2outpost.com/trade/8135336 (1 key)

Rejected

http://www.tf2outpost.com/trade/17379102 (1.33 ref)

http://www.tf2outpost.com/trade/2989872 (1.33 ref)

Sold/offers

http://www.tf2outpost.com/trade/16450085 (2 ref accepted offer)

http://www.tf2outpost.com/trade/3236531 (2 ref offer recently)

http://www.tf2outpost.com/trade/17569597 (3 ref offer)

http://www.tf2outpost.com/trade/17540901 (3 ref offer)

http://www.tf2outpost.com/trade/17723924 (1 key added)

http://www.tf2outpost.com/trade/11998262 (3 ref offer recently)