The other Unisaw was never used. The poor guy retired, bought the unisaw, started to set up shop and dropped dead. I saw it on Craigslist for $500 and after a week it went down to $250 and I bought it. It has the Unifence with extra long guides.
That's close to winning the Lotto. An unused Unisaw today would probably easily sell for $1200 or more. Even old beat up Unisaws will easily sell for $500-$750. And depending on where you are in the country, they can be very rare.
I just checked Craigslist in the Detroit Area, and there are 4 Unisaws. Prices are $500, $600, $900, and $1200.
The $500 saw is about 40 years old. The other three are 20-30 years old.
Both the $500 and $600 saws have the cheap fence. The more expensive saws have Unifences.
I bought my Unisaw new about 25 years ago, for $1600. Looks like I could sell it today for $800-$1000.
Having said that, if it were me, I'd definitely look for a used saw, if you can wait for a good deal. But don't be surprised if you are waiting for a year or more.
Or just looked for any used table saw. You might find that Ridgid for half the price of a new one. You never know.