It's comparable to the FN 300 (Supreme) action and "Santa Barbara", as it's the same and only very slightly modified, so, if you want to compare it to a HVA 640 series, the Zastava have the benefit of hinged floorpalte, side mounted sliding safety and (not bad) factory adjustable trigger (on most models, not all though) and factory drilled and tapped for scope mount.
Mechanically, it compares to both small small rings Brno 21/22 and HVA 1640, but it's a large ring.
So, it compares to Ruger and Cz 550 just like a any other "commercial" "Supreme" M/98 type action compares to them.
The below 500.00 $ price they now go for is somewhat Baïkal Canada's (the actual Canadian Importer) fault, as they liquidated a big bunch of them to bring in the "modernized" versions in (which I still didn't see any yet).
Do not expect the next arrivals to be so low in price, unless Baïkal gets a top deal, but I personally doubt it.
The ones in European calibers are, for sure, of a different source, so the price may (should) reflect their "standard" pricing.
Make a search on the Furom, as Zastava's rifles are very often discussed and it's always the same questions that arose and were repeatidly answered.