Regarding university students, you value uniformity, we value diversity.

From the mouth of a strict teacher comes valuable instruction.

If you hesitate doing something, it might not be important to you.
(Of course, we often hesitate with things that are in fact important to us, because we're afraid to fail. So this proverb is more meant/used as a motivation for someone hesitating, or even as a teasing to get someone into action)

Whether you succeed or not, the attempt has value.

This is super valuable!

This kind of wood is worthless when it gets damp.

How valuable is this hair ornament?

My breastplate is as valuable as yours.

I don't value that over this.

My computer is worth 70 euros.

That burnt cloth is of little value.

That's not worth a thing!