Most of the reviews I've read on Shop Fox w1678 have been positive. If that's what's on your Craigslist it is worth a look. I believe that SF is no longer in business so that would concern me. Parts may be available from Grizzly?
You mention that you have a CNC so I assume that you have a DC. A decent DC is a requirement for these machines. I have a 1100 CFM DC that barely keeps up with my Woodmaster.