That gen Taurus came with the option of two 3.0's. The 3.0 vulcan debuted back in the early 80's and is a cast iron, OHV valve engine putting out about 160hp. The optional 3.0 Duratec is an all aluminum, DOHC, putting out 200hp.
A quick pop of the hood will let you know what you're looking at. If I were looking to buy, I'd prefer it have the duratec. But, the vulcan will do you OK also.
With such low miles on the one you're looking at, I doubt there's much to be concerned about at present. Biggest potential downside further down the road is trans issues, but if you stay on top of fluid/filter changes you'll be OK.