I think I remember my Dad paying somewhere around $700ish for our AppleCD 300 (caddy loading) in December 1993...at the time CD-ROM was the new, new, new thing, and they were certainly not cheap.

For what its worth, in 1994 Apple did actually do a "Multimedia Kit" where you got a caddy loading AppleCD 300 and a pair of the original AppleDesign Powered Speakers. They might have done a similar thing with the CD 300e and ADPS II, I don't know.