Used saw values (Ridgid, basic Grizzly) and value of a riving knife

Hi, Been looking casually for a table saw recently and there are a couple of potentials on Craiglist near me.

• Ridgid TS3660, asking $450
  This sounds a little high considering the table is probably 10-12 years old and today’s new R4512 is $750 with a riving knife. On the good side:
  (+) Everyone likes this saw model, I used to have a Ridgid 3650 when I lived in another state and it was quite good
  (+) Has the Herculift base which is decent
  (+) Appears to have the extra-long sliding fence rails
  (+) Cast iron wings.. nice to have. Bad side:
  (—) Doesn’t have a riving knife, looks like the basic splitter might also be missing.

• Grizzly 1022Z, asking $175
  (+) Looks very clean; probably ‘98 or so I’m guessing
  (+) Couldn’t even buy a plastic-body saw for this money
  (+) Clean guard/splitter but no riving knife obviously

I could see the argument for the Grizzly considering it’s a pretty good price and neither one has a proper modern riving knife setup. What’s the value of the Ridgid these days? Are they still as loved as they used to be, or is it “Give me a Riving knife or nothing” these days?

(I’m a very casual weekend warrior and I’d like to keep my fingers.)