That's a steal if the machine is in good nick.
Appears to be a CO500, but could be a 600.
(Edit:
I think so, as seems the column is narrower on the C600 compared to ACM and many others , and heavier gauge used instead, hence my earlier presumption of it being a 500)
The CO's are likely the best machine you can buy, full stop.
Most of the NRA's I've seen are 600mm machines, and maybe 50kgs lighter than the equivalent CO 600
(not looked for a NRA 500)
Subtle things on these machines like adjust ability of the top wheel L/R and in/out
think the guidepost may be adjustable on the CO's if someone can clarify that, cant find a pic of the back to see set screws.
Big threads to tension blade makes for just as fast as the quick tensioner bells on far eastern saws.
A lovely machine in that pic, looks like its had an easier life than this Centauro compact that's being going for 750 on the bay, used in a metal factory and hasn't been taken.
I'd guess the 500 might be more sought after being a perfect size for some.
Not seen an Italian 500 saw in the flesh, but if it's anything like the newish Felder,
say in manor woods iroko video, quite a bit larger than the far eastern 20"
(A 510 machine IIRC if they haven't changed to the standard heavier line 40 series)
which might explain a spacious cabinet, compared to the wheel crammed in there,
smaller column, and small table.