son caras

are expensive

→ ser
phrase Rare #38,501
are expensive Used to describe something that costs a lot. The adjective agrees in gender and number with the noun, so it can also be son caros when the noun is masculine plural.
SP: Estas botas son caras.
EN: These boots are expensive.

Son caras.

They're expensive.

— Madre (Madeo) (2009)

Mis clases son caras.

My classes are expensive.

— Ip Man (2008)

Estas joyas son caras.

These jewels are expensive.

Estas botas son caras.

These boots are expensive.

Estas galletas no son caras, pero saben rico.

These cookies aren’t expensive, but they taste delicious.

Las bodas son caras.

Weddings are expensive.