No merece la pena.

It's not worth it.

1. Vale la pena.
   It's worth it.
2. ¿Cuánto crees que vale?
   How much do you think it's worth?
3. Vale la pena aprender esta estructura.
   It's worth learning this structure.
4. No vale la pena visitar ese museo.
   It's not worth visiting that museum.
5. Porque yo lo valgo.
   Because I'm worth it.