I have a circa 1987 genuine Colt AR-15 SP1. It has the Triangle style front grips, and has been unmolested. Factory assembled gun. I have no idea what the round count is but probably in the 3000+ range. It works perfectly. It has one or two scratches, but other than that, normal wear and tear. I know it is a Pre-Ban, unregistered, untraceable rifle. I'm trying to put a value on this thing... perhaps for a trade. What's it worth?