My family or college roommates always had stereo systems, but in my early twenties when I got my own place I was on my own. Got a Denon receiver and a Dual TT at Harvey's in New York City and a Nakamichi tape deck at Audio breakthroughs in Huntington on LI. I bought a pair of used Mirage speakers from a buddy and I was all set.
I started buying my audiophile gear at Sound by Singer by the mid 1980s.
My brother still uses that Denon receiver and it works and sounds great. Amazing stuff!