This.
Are the two of you sure about this?
I remember the Star Wars comic book did not catch on until issue #3 was out or around the time the movie debuted. I remember Star Wars #1 were already going for $10 or more at the time.
If there was any hoarding done, it was probably not done by the collectors of the day. Sure, there were more copies available in the marketplace afterwards, but these were most likely from unsold initial returns sitting in the distributor's warehouses which were now being actively hunted down.
This was probably one of the first "off the shelf" books to go up in price like that so quickly and was most likely one of the first books to start the subsequent hoarding that would become commonplace with Modern books.
Anybody remember Dazzler #1, now that was a really hoarded book.
Dazzler #1 you say???