Not sure, where my grandaunt bought the Sennheiser HD420, which actually was my first piece of hifi equipment. But both the Hitachi radio recorder with detachable speakers (TRK-9300), which served as my first "system" for not too long, and the Technics receiver, cassette deck & turntable and Canton speakers combo, that became my first real hifi system, after the Hitachi thingy had turned out to have an unrepairable bug in the cassette deck section, were from Media Markt. The original, first Media Markt here in Munich, that is - i.e. back in the early 80s, long before it became a huge consumer electronics market chain with hundreds of subsidiaries all over Europe.
Greetings from Munich!
Manfred / lini