A Harrington & Richardson model 65 USMC Reising training rifle chambered in .22lr with a 10-round magazine and vintage Weaver J 2.5 scope attached. This is a full sized, full weight semi-auto rimfire with the charging handle recessed into the bottom of the fore stock. The rifle is in very good condition and the scope is slightly foggy. These rifles were used by the USMC as training rifles. It's a really cool military surplus rifle and a bit on the rare side. $500 shipped.
I own two dedicated 22lr target rifles. A Izhmash CM-2 and a Winchester 75 Target. Both are excellent shooters, very heavy and very stable. The CM-2 is a single shot and a little more accurate than the Winchester 75 repeater. The CM-2 is a bit less expensive than the mod 75 and I actually prefer it over the mod 75. I also own two Anschutzes, a 1702D HB in .17HM2 and a 1710D HB in .22lr and two Volquartsen Standards, one in .22lr and one in .17HM2 also. All four of these rifles are crazy accurate and perfectly capable of filling your needs although all four are field rifles instead of dedicated target rifles. There are many rifles on the market that would suit your purposes but these are the best of what I own.
We took one of those Sam Yang air rifles with a scuba tank and filler hose in on pawn once and it came out for sale. It was truly impressive. I was showing it to a customer and dry fired it upward to demonstrate how loud , and thus powerful, it was and the air pressure alone destroyed a suspended ceiling tile four or five feet above the muzzle. It was actually kind of scary dealing with that amount of pressure in that skinny little light weight reservoir.
We have a used electric full auto M4 air soft rifle for sale here but it just doesn't appeal to me. It's pretty bad ass looking, collapsible stock, folding sights, picatinny rails everywhere, but I just can't warm up to the sound of that motor.