Lots of discussion on Slickdeals about these $55 Wayfarer deals., which pop up all the time. Many there aren't convinced about their authenticity. I'm not saying that these are fake, just caveat emptor.
I emailed pinchit about authenticity, I'll let you know what they say.
Some at Slickdeals already did that. I don't put much (any) credence in the Chinese importer's word, personally. It's not as if they are going to confess over email. Several of these $55 deals have, in the past, been fakes. That's enough for me to move on.