Third suggestion. 3 month old price, needs a small drop.

Classifieds at time of posting: http://backpack.tf/classifieds/?item=Brainiac%20Goggles&quality=6&tradable=1&craftable=1

4 for 1.44 ref.

6 for 1.55 ref.

Around 1 and a half pages for 1.66 ref.

Sellers at lower than 1.66 ref:

http://www.tf2outpost.com/trade/23144378 1.33 ref, young.

http://www.tf2outpost.com/trade/23030570 1.33 ref.

http://www.tf2outpost.com/trade/22976485 1.33 ref.

http://www.tf2outpost.com/trade/23067606 1.33 ref, poorly bumped.

http://www.tf2outpost.com/trade/23127799 1.33 ref

http://www.tf2outpost.com/trade/23043550 1.33 ref, poorly bumped.

http://www.tf2outpost.com/trade/23144279 1.55 ref, somewhat young.

http://www.tf2outpost.com/trade/23126752 1.55 ref.

http://www.tf2outpost.com/trade/22857253 1.55 ref. (1 scrap below bp.tf price)

http://www.tf2outpost.com/trade/23140099 1.55 ref, somewhat young, considered to be poorly bumped.

http://www.tf2outpost.com/trade/22989744 1.55 ref, poorly bumped?

http://www.tf2outpost.com/trade/23125582 1.55 ref.

Unsolds at 1.66 ref:

http://www.tf2outpost.com/trade/23087110 3 days old.

http://www.tf2outpost.com/trade/23116195 1 day old, young.

http://www.tf2outpost.com/trade/23122655 1 day old, young, has multiple for sale.

http://www.tf2outpost.com/trade/22791233 2 weeks old.

http://www.tf2outpost.com/trade/23108549 2 days old, young.

http://www.tf2outpost.com/trade/23071260 4 days old.

http://www.tf2outpost.com/trade/22635758 4 weeks old.

http://www.tf2outpost.com/trade/22952746 1 week old.

http://www.tf2outpost.com/trade/22567216 1 month old.

http://www.tf2outpost.com/trade/23103367 2 days old, young.

http://www.tf2outpost.com/trade/23069880 4 days old.

http://www.tf2outpost.com/trade/22787334 2 weeks old.

http://www.tf2outpost.com/trade/22996058 1 week old.

http://www.tf2outpost.com/trade/22707889 3 weeks old, poorly bumped.

4 pages on TF2 Outpost. A lot of unsolds and 1.33 - 1.55 ref sellers are starting to happen.