I recently bought a Colt M16 (Pre-A1) upper from JAR420.
Advertised as a Slick-side upper, A1 sights, straight slip-ring, Delta handguards, skinny 1:12 barrel, A1 birdcage, small pivot holes. Still with cosmoline on it and cardboard insert in the barrel. No BC, B or CH.
My paypal account was charged on the 24th and it arrived today (the 30th). It was as advertised with slight marks from storage and handling. I am pleased. I would buy from this individual again.