I have a couple of Marlin 30/30's. I like them alot. I had picked up used models at gun shows as they came up, and both are very well made with forged steel components and nice wood.
That said, most hunting rifles will last forever when shot only a few dozen rounds per year. My 1960's Marlin probably has under 300 rounds on it, and similar rifles will be available for a long time.
For now, get an AR. They are available for a great price, and are proven to be extremely durable and long lived. $50 will buy you the spare springs and extractor that will keep your rifle reliable for thousands and thousands of rounds. I happen to like a Bear Creek Arsenal side charging AR I built in 7.62x39. I assembled the complete upper with a free float handguard and BCG for under $400, and it has been a great rifle. I like the simplicity of the side charger, and the 30 cal. x39 round has a nice punch to it, and reasonable hunting ammo is available.
I still keep an eye out for the used Marlin, or Winchester bolt action hunting rifle that comes to market at the local gun shows, but for a readily available, modern sporting rifle, I buy my AR's new, and add an upper to suit.