Atipp - It sounds like a good deal to me, assuming that they'll last you a while. There are other options out there, but if it fits your budget and you like the ADAT method of working, it seems good.
I have quite a bit of experience with the black faces. Yes, they're the early ones, but there's no problem with high- or low-end reproduction. Mine have been extremely trouble free, and all three have well over a thousand hours on them. Regular preventative maintenance helps them out a lot. Whether your seller has treated them right is for you to decide, but 300 and 600 hours isn't bad.
All the newer models have more features and higher specs, but even the originals record at 48/16, which is still better than a CD. The low bit rate "hurdle" is much diminished if you use them as I do, that is, passing the audio eventually into a PC running all fx, fades, etc. at 32-bit. This way the actual audio, of course, is still at 16, but any of the processing is at 32.
Older ADATs are like anything else that has been updated... the fact that there's a newer model doesn't make the old model sound bad.
Ken Rutkowski
Outer Limit Recording Studio