Around 1974-76, I started mowing lawns. Saved $$ and wondered what I should buy. Stereo of course.
No 1 - MCS 3112 or thereabouts Receiver, MCS cassette deck, speakers my uncle gave me, zip cord. My child hood best friend had this stereo until about 10 years ago.
No 2 - a few years later. MCS 3233 33 WPC Receiver, MCS cassette deck (much better than the prior deck), MCS TT, MCS speakers plus more speakers my uncle gave me, thicker zip cord, Radio Shack EQ. This system was much better than No 1. Lasted me until I went in the military in 1983.
Check out Ebay for MCS (Modular Component Systems) stuff.