Silly pointless ephemera here, but I was curious. How long were most 45s actually available? As a kid of the '80s, I was around to experience the near-death of the format, but too young to pay attention to such details. I'd assume that songs that became huge hits would have been available for quite some time with numerous pressings, but what about those songs that didn't set the world on fire (or didn't chart at all)? Was there a one-time print run done for most singles and when the stock was gone, it was gone? I've just always had the impression that, despite the generally lower prices and lack of interest in 45s from many vinyl collectors, they must be a whole lot "rarer" than the average LP. I'd assume that while that LP may have been in print in various configurations for decades, the 45 from it was probably only available for a matter of weeks or months (not counting reissues). Is that true or am I way off?