Price update, please have a look at proofs below:

Selling for 1.66 ref:

http://www.tf2outpost.com/trade/8274823 (being offered 1.44)

http://www.tf2outpost.com/trade/8623047

http://www.tf2outpost.com/trade/8630339

http://www.tf2outpost.com/trade/8641877

http://www.tf2outpost.com/trade/8600107 (TOD ticket, being offered 1.33 rejected)

http://www.tf2outpost.com/trade/8637818

http://www.tf2outpost.com/trade/8610165 (has engineer's part)

http://www.tf2outpost.com/trade/8475153 (added)

http://www.tf2outpost.com/trade/8562544 (added)

Selling at 2 ref:

http://www.tf2outpost.com/trade/8597198 (have 1 add)

Being offered 1.33 ref:

http://www.tf2outpost.com/trade/7535896 (1.33 recent offer, 1.88 1 month old offer)

http://www.tf2outpost.com/trade/8407804

http://www.tf2outpost.com/trade/8563138

http://www.tf2outpost.com/trade/8256495 (rejected, wants 1.66 ref. 1 willing buyer added)

Being offered 1.66 ref:

http://www.tf2outpost.com/trade/5552807

http://www.tf2outpost.com/trade/7447237

http://www.tf2outpost.com/trade/8545551 (TOD)

http://www.tf2outpost.com/trade/8452947

And of course, my very own trade (which is now closed):

http://www.tf2outpost.com/trade/8642186 - only 5 views and 1 bump. Sold for 2 ref instead of my asking price. (buyer is too kind)

http://imgur.com/tr6KJvi

Seeing that there are still some unsold at 1.66 ref and a some offers of 1.33 ref, 1.33-1.66 ref seems like a legit price at the moment and you can't get this for 1 ref in outpost or bazaar.tf.

The one in the classifieds was sold instantly. (bought by me and I sold it for 2 ref in just minutes.)