Some generous and diligent people have taken time to scan in complete issues of music technology magazines from the early 80’s onwards.
If you are in to this sort of stuff it will keep you entertained for months. Adverts, prices and reviews of the classic techno machines. State of the art 4 track recorders, discussions about the forth coming midi. Machines that you can’t find on youtube (Allen and Heath Drum machine!)
http://www.muzines.co.uk/mags
http://www.muzines.co.uk/articles/the-flexible-drumbox/3326