Crime wave? Who fences the frames?

It may be the economic situation or it may just be a coincidence but there appears to be a  lot of optical crime going on at the moment. One practitioner I recently spoke to said she understood the opportunist sunglass theif but what about the opticals?

These thefts look increasingly ochestrated with theives going for the good stuff and leaving everything else alone. If the frames are being stolen to order there must be a practice somewhere that is recieving the stolen frames and having them glazed and selling them at proper prices.