As retro mentioned, the integrity of the frame between grommets is one frequent failure point. The early Prince Graphite and Comp had common failures at the top of the hoop and also the first few holes outside of the throat. Others to suffer the same fate were the early Graphite Edge, XRC, F200 and early Sting. Check these areas carefully when purchasing and be particularly careful when restringing. A lower tension, some tubing and a few power pads can do a lot to keep these frames playable.
Have fun with the old sticks!