I'd like to get a FSM CD that covers at least the 80s-90s W124 E-class M103/4. It would be nice if it covered 90s-00s W210 E-class as well. I'm particularly interested in diagnostics, electronics, specs and special tools. Maybe someone could tell me:

Where is a good source for these (besides ebay)?
Do the CDs cover multiple chassis/classes or are they more specific?
IMPORTANT!: Will they run on a MAC computer?
About how much do they cost?

I would consider used ones if anyone has some they don't need anymore.
Thanks