これが価値のあるものかどうか、私には確信がもてない。の英語

I am uncertain whether this is a thing of value.

It's just not worth it.

anything that is supposed to be valuable but turns out to be worthless

It won't be worth the risk.

I have no self-esteem.

This is more worthwhile than that.

It isn't worth much.

It's not worth much.

It is of little wrote.

If a thing is worth doing it is worth doing badly.

Not even worth a thought.

It's not even worth a thought.

Of what value is it?

I think it's worth asking.

It is of little value.

It isn't worth a pin.

It's really worthwhile.

something that has no value

a feeling of being of little worth

What kind of value can that offer?

of no value or worth

It is of no practical value―destitute of practical value―practically valueless.

Is this valuable?

Whatever is worth doing at all, is worth doing well.

The discovery is valueless from a commercial standpoint―from a commercial point of view.

the quality of being valueless or futile

It is of great value.

Don't underestimate the value of this heirloom-you may sell it at a good price

A beautiful object like that never loses its value.

It has a value all its own.