I would never hesitate to buy an older 64 action. They are very reliable and that's why you see them for sale often. Like the savage anschutz from the 60,so and 70,s.There is also a very good supply of parts available and Nordic has most in Stock. 54 actions are preferred by the top shooters,but the average person is probably not going to see much difference. Again if you have a match ammo that works great in your 64 and a so so ammo in a 54 action the 64 will most likely out shoot it.I think the best bang for your buck is still a MPR. The debate on a magazine vs single shot again is the mag feeding the round nicking or deforming the lead and ruining the aerodynamic.