First Mac I ever owned was a Mac Classic when I was around 4 or 5 or 6, don't remember exactly. I Have no memory what the specs were. It's now in a closet in my dad's office, but it still works fine! I started it up, not too long ago, and it is really surprising how fast it started up! It was 6.0.4, I believe, and it had basically nothing to load on startup, so it was really fast! Noticed how the OS X System Preferences really are like the old control panel from System 6, as it was just one window with different preference "panes".
First Mac I ever owned that was my own was a Performa 636CD. That one was 33 MHz, with around a 250 MB HD (don't remember exactly), and 8 MB of RAM, which I maxed out to 40 megs of RAM, LOL!
Adam.