Powermatic is a very good name brand. Having said that, the Saw pictured is one of their least expensive models. It is basically a heavy job-site Saw.
It has a lot of nice features like the fence, roller base, two Miter gauges and the dado throat plate. But it also has open extensions which I find a drawback. It looks to be clean and in good shape. $600 is a fair price for the Saw.
Brand new job-site saws are available in other brands around that price.
If you don't have time to do it right the first time, when will you have time to do it over?