There is simply no demand for the uncraftable one. Only 2 trades with 1 ref price and both remained unsold or no offers at all. I know I don't have any proof showing trades selling for 0.66 ref. But go through the ones below and you will see why:

Unsold for 1 ref:

http://www.tf2outpost.com/trade/8858803 (2 days)

http://www.tf2outpost.com/trade/8796244 (4 days)

No price:

http://www.tf2outpost.com/trade/8775466 (5 days, no offer, inactive)

http://www.tf2outpost.com/trade/8817787 (3 days, no offer, inactive)

http://www.tf2outpost.com/trade/8828328 (3 days, no offer, inactive)

http://www.tf2outpost.com/trade/8796244 (4 days, no offer)

http://www.tf2outpost.com/trade/8842279 (2 days, no offer)

http://www.tf2outpost.com/trade/8893318 (14 hours, no offer)

at bazaar.tf:

http://bazaar.tf/trade/131589 (selling for 1 scrap)

One buyer for 0.66 ref:

http://www.tf2outpost.com/trade/8771429 (rarely bumped, 1 bookmark)