When did Colt last make AR's for the civilian market? What is the perceived collector's value of these older Colt AR's and what are these things actually selling for.
I can't tell you the value of an SP1, but I can tell you Colt still makes a lot of ARs for the civilian market. The SP6920/LE6920 is probably the most popular. You can buy them at Wal-Mart.