I'm in the market for a "new" table saw. Needs to be a US-made saw, which pretty much narrows it down to a Unisaw or PM66.

Seeing as how both saws have been around nearly forever, those out there on CL certainly vary in terms of age and condition. That being the case, I've found it's like shopping for an old Corvette. Everyone with a Corvette thinks that theirs is worth no less than $10k, even if it's really a rusted out basket case worth $5k. So most people are either high, or way high in their asking prices, but some are reasonable.

Is there any way to place a real value on a saw, beyond the purely arbitrary "doesn't seem too old, and looks ok, I guess it's worth $1k"?

Should a 10 year old saw be less than a 5 year old? What about 15-20 years? Usage obviously has a lot to do with it, but that's hard to assess, especially in a saw that might have changed hands already.

Thanks!
Dave