I have a chance to pick-up a barely-used, good-condition, 590a-1 for $300....It is the "Tactical-Tri-Rail" model, with GRS....It has the Mossberg "feeding-issue," and will feed the first two-rounds, but not the remaining six...My thinking is that the feeding-problem is probably an easy-fix....Serial no. indicates a 2013 mfg date...'Good deal??.......Your thoughts and input are appreciated.