It's also not just a question of the sheer numbers of core sets produced, but how they were allocated to the various classes of retailers.
While I have seen lots of reports of the game being scarce in hobby shops and in non-US countries, I have also seen lots of reports of there being tons of stock at Target and Barnes and Noble stores. My own experience bears this out as I have seen several Target and B&N stores with multiple copies collecting dust. I have seen some Targets with a dozen copies on the shelf.
I have no real knowledge of how distrbution contracts with mega chain stores like this function. But it does seem from anecdotal evidence on the internet that FFG allocated too many to Targets and too few to the small stores. But like Lando Calrissian, they may have had no choice if they wanted to deal with the Empire at all. I suppose they will evaluate whether that strategy worked well if they end up with tons of merchandise being clearanced out at Targets while LGSs can't get their hands on them.
Be seeing you.