I find it easier to find a working model to slip the hard drives over to the next machine.
If you only need to get the files out I use USB HDD cases (run about 20 bucks each) to use them as externals to fish files out.
I can't guess what cost effective today is.
I have an old Mac 7100. The mouse quit working (I tried a different keyboard and mouse, same result) Then the monitor died, so I have no way to even check it further. I live in Phoenix, AZ, and I have had no luck in finding anybody who would even talk to me about this computer. If I could get it working again, that would be fine, but if not, I would be satisfied to get the music files off of the scsi hard drive, which I'm pretty sure is fine. But as I said, nobody around here can or will help. Is there a cost effective way to do this?