[Schlagbohrer]

For those of us who appreciate PCBs as works of art, it never occurred to me that I could make a silver plated board just as a flex.

[rkangel]

I think that in addition to the cost you would also have a corrosion problem. That's usually the reason that silver isn't used as an engineering material.

[cyberax]

You totally can! But it'll just look like it's made out of aluminum :(