Thanks for your feedback. Of course in Madrid, like in any other old 5
million people city, you can still find 78s. The trick is, as you said,
that it seems that demand is falling down, and so does immediate supply.
Noticeable fact is that you still can find'em, but you must search much
more than years ago, when many antique shops had them, and certain stalls
at the flea market used to have them always, apart from scattered stalls
here and everywhere which also had them, one day here, another day there...
Now one must go to dealers that continue selling records, and ask for 78s
day after day for occasional success. It is also true that having a serious
collection at home, most of times you don't find 78s of interest...