Two years ago I put a fancy stock on my old Sheridan air rifle, and had Mac1 put the steroid kit on it and add a peep sight. Then I gave it to grandsons. My son-in-law is a contractor in one of the building trades and borrowed it to shoot some pigeons in a location where he was building a house. He found it worked so well on pigeons a good distance away he now wants one for himself. That Sheridan has the thumb safety one must hold down while pulling the trigger, which I prefer. He would prefer to get one with the "rocker safety". Anyway, I would like to find one in good condition on the outside, even if it needs rebuilding on the inside as he would probably want the steroid kit put on it. Do they come up for sale often? And what's the best way to find a good one?