I think the answer is "enough". If the price goes down you'll get more buyers. If the price goes up you'll get more sellers. It'll be available so long as anyone wants it.
I've noticed a little bit of premium on European silver lately, especially crowns. More than on common US.
I like sterling silverware. It has a nice feel and appearance, and has reputed health benefits. But it trades much differently from coins. It almost never can be purchased at anywhere close to bullion price, yet buyers pay far less. At least with coins and bullion you're participating in the commodity market at much lower spreads.