Classifieds at the time of posting this suggestion.

x1 at 1.44 ref - http://i.imgur.com/GiQXwkN.png

x3 at 1.55 ref - http://i.imgur.com/rczMGVC.png

x8 at 1.66 ref - http://i.imgur.com/GviTxhE.png http://i.imgur.com/Y5MXdvV.png

x1 at 1.77 ref - http://i.imgur.com/KmYK2Co.png

x2 at 2 ref - http://imgur.com/4pCk9V2 (7 of them are from the same seller).

The rest are special levels/craft numbers.

Taking a look at buyers on the Classifieds one can easily see that 1.44-1.11 is a quick buying/selling price.

http://i.imgur.com/3Bh6Pm1.png

Sellers on Outpost.

http://www.tf2outpost.com/trade/28211213 - 4 ref(?) - Check their pricelist, 1 month old.

http://www.tf2outpost.com/trade/27875070 - 2.33 ref, 4 months old.

http://www.tf2outpost.com/trade/28335218 - 2 ref, 4 days old.

http://www.tf2outpost.com/trade/28334691 - 2 ref, 4 days old.

http://www.tf2outpost.com/trade/28344977 - 2 ref, young.

http://www.tf2outpost.com/trade/28305995 - 1.66 ref, 2 weeks old.

http://www.tf2outpost.com/trade/28329487 - 1.66 ref, 6 days old.

http://www.tf2outpost.com/trade/28332987 - 1.66 ref, 5 days old.

http://www.tf2outpost.com/trade/28339049 - 1.66 ref, 3 days old.

http://www.tf2outpost.com/trade/28346509 - 1.66, young.

http://www.tf2outpost.com/trade/28346771 - 1.33 ref, young.

http://www.tf2outpost.com/trade/28330597 - 1.22 ref, 6 days old.

-

http://www.tf2outpost.com/trade/28342429 - "1 scrap less than bp.tf price", 1 day old.

I am excluding all sellers with their price as "bp.tf price" as the item has a flexible price.

Many unsolds at 2 ref and even 1.66 ref but one can easily see that 1.44-1.11 is quick buying/selling price which makes it reasonable to price it 1.66 flat.