Silver plated antiques are certainly not worth as much as sterling or other alloys with high silver content. However, your silver plated items may still hold value and could be worth some money. The value of silver plated flatware, for example, has a lot to do with what base metal is found underneath the silver. If copper is the underlying metal, the value of the flatware could be worth the price of copper scrap.
Silver plated Holloware may have more value, as it is often considered in a class of its own. Holloware includes plates, serving dishes, bowls, trays, teapots, and other non-cutlery pieces. Silver plated Holloware often has value because it isn’t as common as flatware, and historically, it had a higher price tag. Silver plated tea sets can have a price tag of well over $100 due to their rarity and age.