Last summer a rep from Prince told me "racquets degrade over time" and recommended I get a new frame while trying to come back from shoulder surgery and 15 years away from the game. She said older racquets break down and would be more harsh on my arm. Does this make sense to y'all? I spoke w/ a sales rep at TW today who said he thought this meant that racquets degrade with use rather than time. So, if I wanted to buy a discontinued, but unused, racquet that a few years old that there wouldn't be a problem. Any thoughts?