Shooting 70# with a compound is nothing like holding 70# with a trad bow. Pull your compound back, just before it breaks, that is what you will be holding at full draw with a trad bow. What im getting at? Dont run out and get a 65-70lb trad bow. You will learn bad habits. Im 6'4" with a little over a 30" draw, and have shoot trad bows for over 20+ years. I hunt with bows at 50 to 65lbs. I learned on a 35lb bow. You dont want to start with abow that is too heavy.

As for old bows. I have one from 1978, one of my first hunting bows and it still shoots as well today as it did the day I bought it. It all depeneds on materials and how well the bow was cared for. Good luck.