Yes, it is a ZZ machine. I can tell by the pics it needs a thorough cleaning, but that's no big deal.
It's a Japanese made machine very similar to many others have here. I have several similar to it, and all but one sews beautifully. The one that doesn't will eventually.
Is it worth the money? Well, I think it is, not only for the machine, but that cabinet too. I'd still do my best to bring it down some. I've paid more for some machines but I wanted them bad. So, that's the crux of the mater, how bad would you like to have it?
Joe