son caros

they are expensive

→ ser
phrase Rare #40,090
they are expensive “Caros” agrees with a masculine plural noun or group; use “caras” for a feminine plural group.
SP: Los restaurantes de esta zona son caros.
EN: The restaurants in this area are expensive.

Estos zapatos son caros, y más encima, son demasiado chicos.

These shoes are expensive, and on top of that, they're too small.

Los aviones son caros.

Airplanes are expensive.

Algunos son caros, y otros son muy baratos.

Some are expensive, and others are very cheap.

Son caros pero tan buenos como los europeos.

They are expensive but as good as the European ones.

— Asuntos infernales (2002)

Los medicamentos son caros.

Medicines are expensive.

Estos libros son caros.

These books are expensive.

Los coches son caros.

Cars are expensive.