Spot the pre-ban upper on the post-ban lower.
Give lower manufacturer, configuration, price, approximate location, and any additional information.
Here's my entry:
Eagle Arms lower (obvious current manufacture).
A2 stock, 11.5" barrel, 5.5" flash suppressor, bayonet lug.
$650.00
First row on the left, just past the hot dog stand.
Would've mentioned it to him, in a friendly "he might not have known" kind of way, but the spare mag holder (forget what they're called) thingie clamped over the mag well, obscuring the identifying manufacurer info, led me to believe he knew what he was doing. Didn't want to waste any breath, as I might need it later to haggle.