The knife is high on demand. Many ppl offering at 0.66 ref with not much success (not talking about quickbuyers). Even some 1 ref offers were rejected. 1.33 ref is definitely do-able, please have a look at the proof below:

Selling at 1 ref:

http://www.tf2outpost.com/trade/8406972 (added)

http://www.tf2outpost.com/trade/8318005 (multiple adds)

http://www.tf2outpost.com/trade/8413138 (added)

http://www.tf2outpost.com/trade/8445883

http://www.tf2outpost.com/trade/8424029

http://www.tf2outpost.com/trade/8028420 (multiple adds)

http://www.tf2outpost.com/trade/8442025 (trade relatively new)

http://www.tf2outpost.com/trade/8413132 (added)

http://www.tf2outpost.com/trade/8428670 (laggylaptop lol, 1 add, not sure if trade gone through)

Selling at 1.11 ref:

http://www.tf2outpost.com/trade/8210427 (had an initial offer of 1.33 ref, but retracted, other adds)

Selling for 1.33 ref:

http://www.tf2outpost.com/trade/8438972

http://www.tf2outpost.com/trade/8428669

http://www.tf2outpost.com/trade/8448915 (9 hours ago)

http://www.tf2outpost.com/trade/8303122 (lots of ppl added to buy)

http://www.tf2outpost.com/trade/8254851 (not sure if he sold a few, there were a few ppl adding him)

http://www.tf2outpost.com/trade/8419609 (not sure if he sold 1 or a few, click on the knife and you will see a different owner, indicating sold)

http://www.tf2outpost.com/trade/7274701 (not sure how many sold, click the knife, its a different owner)

http://www.tf2outpost.com/trade/6913249 (again, guessing that he sold a few, had a few adds)

Sold at approx. 1.33 ref:

http://www.tf2outpost.com/trade/8298800 (assuming he sold it at that price, due to the fact that one guy offered backpack.tf price and was rejected)

http://www.tf2outpost.com/trade/1841794 (in one comment, he stated that he sold many at 1.33 ref and rejected other 1 ref offers)

To wrap it all up, here's my own trade selling it for 1.33 ref :3 :

http://imgur.com/hzPJeui

Please let me know what you guys think. Its kinda nice to see my previous suggestion still valid after 3 months though :3