What wld be reasonable price (fair to me and buyer) for used Ruger Mini 14 .223/5.56? Has tactical style stock (Tapco I think) 6-pos adjustable (no orig stock came with), bipod, foreward grip, and 4 or 5., 20-30 rd mags. I Really like this rifle (iron sights spot on) but may sell to get new Ruger AR 556. Thoughts fellas? Any and all legit input much 'preciated!