I just picked up one in the12 ga cal. I actually stole it I think. I only paid $200 for it. It was new and unfired. I haven't played with it yet, but plan to set it up for turkey hunting.
It does have a choke, but I have been busy and have not checked it out as to what tube is in it. I have been told that a Winchester, Moseberg or Weatherby tubes will work in it. Not sure but will find out soon.