I have a vintage Sony mini system. This was top-of-the-line in 1985. The mini-system retailed for $599 and the CD player was another $299. This is a seriously powerful and good-sounding system. These are extremely hard to find due to age and how much they cost back in the day. This is a great-working system, except that the tape deck does not work and just runs continuously. It sounds like it needs a belt. I just unhooked it from the main system. The tuner works great, and the integrated amplifier works extremely well. I lubed up the controls for a nice smooth experience with no static. The CD player works well but sometimes has trouble reading CDs. I don't know if it just needs a clean and lube or what, but sometimes it works perfectly and sometimes it has trouble. The speakers have holes on the inner sides, I think from being attached to the main system at one point. They're on the inside so you can't see them normally anyway. Maybe that's how they came? Who knows? The plugs on the power cords were shaved down at some point to fit into a tight space. They still work fine.
Thanks,
Marc