Do they look like cleaning marks?
Marks on the front element usually won't show up in photos, but in extreme cases they may lower overall contrast or affect flaring. With used lenses, its almost impossible to get "perfect" samples. They will almost always have dust inside, wear on the barrel and front element.. but these things generally dont affect IQ. What you should look for is whether the aperture blades work normally, if the lens elements are centered, if it focuses to infinity..
The FA 20 looks like a really interesting lens. Good luck and enjoy your newly acquired lens