Apparently the price varied somewhat.
Around 1976 (if memory serves) I heard a pair of 19's in a stereo store in Berkeley,Ca.
It seems the list price was $2400 for the pair. It was fairly depressing because
it was by far the best sounding speakers I'd ever heard however the price was
insurmountable at the time. Little did I know that I'd be fortunate enough to have
my own pair of 19's eight years later.